switch to insta for testing

20 files changed, 495 insertions, 195 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 504a5633f..2c4337a70 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -118,7 +118,7 @@ dependencies = [
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -156,6 +156,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "clicolors-control"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "cloudabi"
 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -164,6 +175,23 @@ dependencies = [
 ]
 
 [[package]]
+name = "console"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clicolors-control 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "encode_unicode 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termios 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "crossbeam-channel"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -260,6 +288,11 @@ dependencies = [
 ]
 
 [[package]]
+name = "encode_unicode"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "error-chain"
 version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -340,7 +373,7 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lsp-types 0.54.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -394,6 +427,20 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "insta"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "console 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "itertools"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -448,7 +495,7 @@ dependencies = [
  "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -688,6 +735,7 @@ name = "ra_ide_api"
 version = "0.1.0"
 dependencies = [
  "fst 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "insta 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -708,6 +756,7 @@ dependencies = [
 name = "ra_ide_api_light"
 version = "0.1.0"
 dependencies = [
+ "insta 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "join_to_string 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "proptest 0.8.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -742,7 +791,7 @@ dependencies = [
  "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "test_utils 0.1.0",
  "thread_worker 0.1.0",
@@ -1081,7 +1130,7 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.34"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1187,7 +1236,7 @@ dependencies = [
  "pest_derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "unic-segment 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1215,12 +1264,20 @@ dependencies = [
 ]
 
 [[package]]
+name = "termios"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.46 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "test_utils"
 version = "0.1.0"
 dependencies = [
  "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "text_unit 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1494,7 +1551,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
 "checksum chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "45912881121cb26fad7c38c17ba7daa18764771836b34fab7d3fbd93ed633878"
 "checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
+"checksum clicolors-control 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "73abfd4c73d003a674ce5d2933fca6ce6c42480ea84a5ffe0a2dc39ed56300f9"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
+"checksum console 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ecc3753530b959618f617b0cd6494526008d98687f1af5d8f9fa83fa9cdbb594"
 "checksum crossbeam-channel 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "137bc235f622ffaa0428e3854e24acb53291fc0b3ff6fb2cb75a8be6fb02f06b"
 "checksum crossbeam-deque 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f739f8c5363aca78cfb059edf753d8f0d36908c348f3d8d1503f03d8b75d9cf3"
 "checksum crossbeam-epoch 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "927121f5407de9956180ff5e936fe3cf4324279280001cd56b669d28ee7e9150"
@@ -1507,6 +1566,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum drop_bomb 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "69b26e475fd29098530e709294e94e661974c851aed42512793f120fed4e199f"
 "checksum either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3be565ca5c557d7f59e7cfcf1844f9e3033650c929c6566f511e8005f205c1d0"
 "checksum ena 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f56c93cc076508c549d9bb747f79aa9b4eb098be7b8cad8830c3137ef52d1e00"
+"checksum encode_unicode 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "90b2c9496c001e8cb61827acdefad780795c42264c137744cae6f7d9e3450abd"
 "checksum error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "07e791d3be96241c77c43846b665ef1384606da2cd2a48730abe606a12906e02"
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 "checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
@@ -1523,6 +1583,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "38f09e0f0b1fb55fdee1f17470ad800da77af5186a1a76c026b679358b7e844e"
 "checksum im 12.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ae9c7f9bb8aee47fc16d535a705f7867a9fc83bb822e5e1043bb98e77ffeed3c"
 "checksum indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7e81a7c05f79578dbc15793d8b619db9ba32b4577003ef3af1a91c416798c58d"
+"checksum insta 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "60e94ba6dd3521d953caeed96f6ba06f4cdc9e30e398b3ee7acdd680294f87dc"
 "checksum itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5b8467d9c1cebe26feb08c640139247fac215782d35371ade9a2136ed6085358"
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
 "checksum join_to_string 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4dc7a5290e8c2606ce2be49f456d50f69173cb96d1541e4f66e34ac8b331a98f"
@@ -1586,7 +1647,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)" = "0e732ed5a5592c17d961555e3b552985baf98d50ce418b7b655f31f6ba7eb1b7"
 "checksum serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d6115a3ca25c224e409185325afc16a0d5aaaabc15c42b09587d6f1ba39a5b"
-"checksum serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)" = "bdf540260cfee6da923831f4776ddc495ada940c30117977c70f1313a6130545"
+"checksum serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "dfb1277d4d0563e4593e0b8b5d23d744d277b55d2bc0bf1c38d0d8a6589d38aa"
 "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
 "checksum slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b3bc762e6a4b6c6fcaade73e77f9ebc6991b676f88bb2358bddb56560f073373"
 "checksum smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "b73ea3738b47563803ef814925e69be00799a8c07420be8b996f8e98fb2336db"
@@ -1600,6 +1661,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum tera 0.11.20 (registry+https://github.com/rust-lang/crates.io-index)" = "4b505279e19d8f7d24b1a9dc58327c9c36174b1a2c7ebdeac70792d017cb64f3"
 "checksum teraron 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0d89ad4617d1dec55331067fadaa041e813479e1779616f3d3ce9308bf46184e"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
+"checksum termios 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "72b620c5ea021d75a735c943269bb07d30c9b77d6ac6b236bc8b5c496ef05625"
 "checksum text_unit 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "158bb1c22b638b1da3c95a8ad9f061ea40d4d39fd0301be3a520f92efeeb189e"
 "checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
diff --git a/crates/ra_ide_api/Cargo.toml b/crates/ra_ide_api/Cargo.toml
index d42a664b6..f7013c3c1 100644
--- a/crates/ra_ide_api/Cargo.toml
+++ b/crates/ra_ide_api/Cargo.toml
@@ -21,3 +21,6 @@ ra_text_edit = { path = "../ra_text_edit" }
 ra_db = { path = "../ra_db" }
 hir = { path = "../ra_hir", package = "ra_hir" }
 test_utils = { path = "../test_utils" }
+
+[dev-dependencies]
+insta = "0.1.4"
diff --git a/crates/ra_ide_api/src/extend_selection.rs b/crates/ra_ide_api/src/extend_selection.rs
index c3c809c9f..9f0ab2f1c 100644
--- a/crates/ra_ide_api/src/extend_selection.rs
+++ b/crates/ra_ide_api/src/extend_selection.rs
@@ -38,8 +38,9 @@ fn find_macro_call(node: &SyntaxNode, range: TextRange) -> Option<&ast::MacroCal
 
 #[cfg(test)]
 mod tests {
+    use ra_syntax::TextRange;
+
     use crate::mock_analysis::single_file_with_range;
-    use test_utils::assert_eq_dbg;
 
     #[test]
     fn extend_selection_inside_macros() {
@@ -51,6 +52,6 @@ mod tests {
         ",
         );
         let r = analysis.extend_selection(frange);
-        assert_eq_dbg("[51; 56)", &r);
+        assert_eq!(r, TextRange::from_to(51.into(), 56.into()));
     }
 }
diff --git a/crates/ra_ide_api/src/runnables.rs b/crates/ra_ide_api/src/runnables.rs
index 53e49da5b..f1de28094 100644
--- a/crates/ra_ide_api/src/runnables.rs
+++ b/crates/ra_ide_api/src/runnables.rs
@@ -92,3 +92,100 @@ fn runnable_mod(db: &RootDatabase, file_id: FileId, module: &ast::Module) -> Opt
         kind: RunnableKind::TestMod { path },
     })
 }
+
+#[cfg(test)]
+mod tests {
+    use insta::assert_debug_snapshot_matches;
+
+    use crate::mock_analysis::analysis_and_position;
+
+    #[test]
+    fn test_runnables() {
+        let (analysis, pos) = analysis_and_position(
+            r#"
+        //- /lib.rs
+        <|> //empty
+        fn main() {}
+
+        #[test]
+        fn test_foo() {}
+
+        #[test]
+        #[ignore]
+        fn test_foo() {}
+        "#,
+        );
+        let runnables = analysis.runnables(pos.file_id).unwrap();
+        assert_debug_snapshot_matches!("runnables", &runnables)
+    }
+
+    #[test]
+    fn test_runnables_module() {
+        let (analysis, pos) = analysis_and_position(
+            r#"
+        //- /lib.rs
+        <|> //empty
+        mod test_mod {
+            #[test]
+            fn test_foo1() {}
+        }
+        "#,
+        );
+        let runnables = analysis.runnables(pos.file_id).unwrap();
+        assert_debug_snapshot_matches!("runnables_module", &runnables)
+    }
+
+    #[test]
+    fn test_runnables_one_depth_layer_module() {
+        let (analysis, pos) = analysis_and_position(
+            r#"
+        //- /lib.rs
+        <|> //empty
+        mod foo {
+            mod test_mod {
+                #[test]
+                fn test_foo1() {}
+            }
+        }
+        "#,
+        );
+        let runnables = analysis.runnables(pos.file_id).unwrap();
+        assert_debug_snapshot_matches!("runnables_one_depth_layer_module", &runnables)
+    }
+
+    #[test]
+    fn test_runnables_multiple_depth_module() {
+        let (analysis, pos) = analysis_and_position(
+            r#"
+        //- /lib.rs
+        <|> //empty
+        mod foo {
+            mod bar {
+                mod test_mod {
+                    #[test]
+                    fn test_foo1() {}
+                }
+            }
+        }
+        "#,
+        );
+        let runnables = analysis.runnables(pos.file_id).unwrap();
+        assert_debug_snapshot_matches!("runnables_multiple_depth_module", &runnables)
+    }
+
+    #[test]
+    fn test_runnables_no_test_function_in_module() {
+        let (analysis, pos) = analysis_and_position(
+            r#"
+        //- /lib.rs
+        <|> //empty
+        mod test_mod {
+            fn foo1() {}
+        }
+        "#,
+        );
+        let runnables = analysis.runnables(pos.file_id).unwrap();
+        assert!(runnables.is_empty())
+    }
+
+}
diff --git a/crates/ra_ide_api/src/snapshots/tests__highlight_query_group_macro.snap b/crates/ra_ide_api/src/snapshots/tests__highlight_query_group_macro.snap
new file mode 100644
index 000000000..b84aa9c78
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__highlight_query_group_macro.snap
@@ -0,0 +1,26 @@
+Created: 2019-01-15T11:15:20.732493641+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/src/syntax_highlighting.rs
+
+[
+    HighlightedRange {
+        range: [20; 32),
+        tag: "macro"
+    },
+    HighlightedRange {
+        range: [13; 18),
+        tag: "text"
+    },
+    HighlightedRange {
+        range: [51; 54),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [55; 60),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [61; 72),
+        tag: "function"
+    }
+]
diff --git a/crates/ra_ide_api/src/snapshots/tests__highlights_code_inside_macros.snap b/crates/ra_ide_api/src/snapshots/tests__highlights_code_inside_macros.snap
new file mode 100644
index 000000000..14c6e5a4e
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__highlights_code_inside_macros.snap
@@ -0,0 +1,70 @@
+Created: 2019-01-15T11:15:20.732523231+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/src/syntax_highlighting.rs
+
+[
+    HighlightedRange {
+        range: [13; 15),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [16; 20),
+        tag: "function"
+    },
+    HighlightedRange {
+        range: [41; 46),
+        tag: "macro"
+    },
+    HighlightedRange {
+        range: [49; 52),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [57; 59),
+        tag: "literal"
+    },
+    HighlightedRange {
+        range: [82; 86),
+        tag: "macro"
+    },
+    HighlightedRange {
+        range: [89; 92),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [97; 99),
+        tag: "literal"
+    },
+    HighlightedRange {
+        range: [49; 52),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [53; 54),
+        tag: "function"
+    },
+    HighlightedRange {
+        range: [57; 59),
+        tag: "literal"
+    },
+    HighlightedRange {
+        range: [61; 62),
+        tag: "text"
+    },
+    HighlightedRange {
+        range: [89; 92),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [93; 94),
+        tag: "function"
+    },
+    HighlightedRange {
+        range: [97; 99),
+        tag: "literal"
+    },
+    HighlightedRange {
+        range: [101; 102),
+        tag: "text"
+    }
+]
diff --git a/crates/ra_ide_api/src/snapshots/tests__runnables.snap b/crates/ra_ide_api/src/snapshots/tests__runnables.snap
new file mode 100644
index 000000000..ba6cba0ab
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__runnables.snap
@@ -0,0 +1,22 @@
+Created: 2019-01-15T11:15:20.732460119+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/src/runnables.rs
+
+[
+    Runnable {
+        range: [1; 21),
+        kind: Bin
+    },
+    Runnable {
+        range: [22; 46),
+        kind: Test {
+            name: "test_foo"
+        }
+    },
+    Runnable {
+        range: [47; 81),
+        kind: Test {
+            name: "test_foo"
+        }
+    }
+]
diff --git a/crates/ra_ide_api/src/snapshots/tests__runnables_module.snap b/crates/ra_ide_api/src/snapshots/tests__runnables_module.snap
new file mode 100644
index 000000000..b3f2d4d6e
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__runnables_module.snap
@@ -0,0 +1,18 @@
+Created: 2019-01-15T11:15:20.732460109+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/src/runnables.rs
+
+[
+    Runnable {
+        range: [1; 59),
+        kind: TestMod {
+            path: "test_mod"
+        }
+    },
+    Runnable {
+        range: [28; 57),
+        kind: Test {
+            name: "test_foo1"
+        }
+    }
+]
diff --git a/crates/ra_ide_api/src/snapshots/tests__runnables_multiple_depth_module.snap b/crates/ra_ide_api/src/snapshots/tests__runnables_multiple_depth_module.snap
new file mode 100644
index 000000000..6eba482e7
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__runnables_multiple_depth_module.snap
@@ -0,0 +1,18 @@
+Created: 2019-01-15T11:15:20.732522773+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/src/runnables.rs
+
+[
+    Runnable {
+        range: [41; 115),
+        kind: TestMod {
+            path: "foo::bar::test_mod"
+        }
+    },
+    Runnable {
+        range: [68; 105),
+        kind: Test {
+            name: "test_foo1"
+        }
+    }
+]
diff --git a/crates/ra_ide_api/src/snapshots/tests__runnables_one_depth_layer_module.snap b/crates/ra_ide_api/src/snapshots/tests__runnables_one_depth_layer_module.snap
new file mode 100644
index 000000000..f40c762f3
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__runnables_one_depth_layer_module.snap
@@ -0,0 +1,18 @@
+Created: 2019-01-15T11:15:20.732480089+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/src/runnables.rs
+
+[
+    Runnable {
+        range: [23; 85),
+        kind: TestMod {
+            path: "foo::test_mod"
+        }
+    },
+    Runnable {
+        range: [46; 79),
+        kind: Test {
+            name: "test_foo1"
+        }
+    }
+]
diff --git a/crates/ra_ide_api/src/syntax_highlighting.rs b/crates/ra_ide_api/src/syntax_highlighting.rs
index cb19e9515..480b78dce 100644
--- a/crates/ra_ide_api/src/syntax_highlighting.rs
+++ b/crates/ra_ide_api/src/syntax_highlighting.rs
@@ -34,7 +34,8 @@ pub(crate) fn highlight(db: &RootDatabase, file_id: FileId) -> Cancelable<Vec<Hi
 #[cfg(test)]
 mod tests {
     use crate::mock_analysis::single_file;
-    use test_utils::assert_eq_dbg;
+
+    use insta::assert_debug_snapshot_matches;
 
     #[test]
     fn highlights_code_inside_macros() {
@@ -47,25 +48,7 @@ mod tests {
             ",
         );
         let highlights = analysis.highlight(file_id).unwrap();
-        assert_eq_dbg(
-            r#"[HighlightedRange { range: [13; 15), tag: "keyword" },
-                HighlightedRange { range: [16; 20), tag: "function" },
-                HighlightedRange { range: [41; 46), tag: "macro" },
-                HighlightedRange { range: [49; 52), tag: "keyword" },
-                HighlightedRange { range: [57; 59), tag: "literal" },
-                HighlightedRange { range: [82; 86), tag: "macro" },
-                HighlightedRange { range: [89; 92), tag: "keyword" },
-                HighlightedRange { range: [97; 99), tag: "literal" },
-                HighlightedRange { range: [49; 52), tag: "keyword" },
-                HighlightedRange { range: [53; 54), tag: "function" },
-                HighlightedRange { range: [57; 59), tag: "literal" },
-                HighlightedRange { range: [61; 62), tag: "text" },
-                HighlightedRange { range: [89; 92), tag: "keyword" },
-                HighlightedRange { range: [93; 94), tag: "function" },
-                HighlightedRange { range: [97; 99), tag: "literal" },
-                HighlightedRange { range: [101; 102), tag: "text" }]"#,
-            &highlights,
-        )
+        assert_debug_snapshot_matches!("highlights_code_inside_macros", &highlights);
     }
 
     // FIXME: this test is not really necessary: artifact of the inital hacky
@@ -80,13 +63,6 @@ mod tests {
             ",
         );
         let highlights = analysis.highlight(file_id).unwrap();
-        assert_eq_dbg(
-            r#"[HighlightedRange { range: [20; 32), tag: "macro" },
-                HighlightedRange { range: [13; 18), tag: "text" },
-                HighlightedRange { range: [51; 54), tag: "keyword" },
-                HighlightedRange { range: [55; 60), tag: "keyword" },
-                HighlightedRange { range: [61; 72), tag: "function" }]"#,
-            &highlights,
-        )
+        assert_debug_snapshot_matches!("highlight_query_group_macro", &highlights);
     }
 }
diff --git a/crates/ra_ide_api/tests/test/main.rs b/crates/ra_ide_api/tests/test/main.rs
index 7dc1dba73..2b863aedf 100644
--- a/crates/ra_ide_api/tests/test/main.rs
+++ b/crates/ra_ide_api/tests/test/main.rs
@@ -1,7 +1,6 @@
-mod runnables;
-
 use ra_syntax::TextRange;
-use test_utils::{assert_eq_dbg, assert_eq_text};
+use test_utils::assert_eq_text;
+use insta::assert_debug_snapshot_matches;
 
 use ra_ide_api::{
     mock_analysis::{single_file, single_file_with_position, MockAnalysis},
@@ -12,18 +11,7 @@ use ra_ide_api::{
 fn test_unresolved_module_diagnostic() {
     let (analysis, file_id) = single_file("mod foo;");
     let diagnostics = analysis.diagnostics(file_id).unwrap();
-    assert_eq_dbg(
-        r#"[Diagnostic {
-            message: "unresolved module",
-            range: [4; 7),
-            fix: Some(SourceChange {
-                label: "create module",
-                source_file_edits: [],
-                file_system_edits: [CreateFile { source_root: SourceRootId(0), path: "foo.rs" }],
-                cursor_position: None }),
-                severity: Error }]"#,
-        &diagnostics,
-    );
+    assert_debug_snapshot_matches!("unresolved_module_diagnostic", &diagnostics);
 }
 
 // FIXME: move this test to hir
@@ -31,7 +19,7 @@ fn test_unresolved_module_diagnostic() {
 fn test_unresolved_module_diagnostic_no_diag_for_inline_mode() {
     let (analysis, file_id) = single_file("mod foo {}");
     let diagnostics = analysis.diagnostics(file_id).unwrap();
-    assert_eq_dbg(r#"[]"#, &diagnostics);
+    assert!(diagnostics.is_empty());
 }
 
 #[test]
diff --git a/crates/ra_ide_api/tests/test/runnables.rs b/crates/ra_ide_api/tests/test/runnables.rs
deleted file mode 100644
index da8d5e0d5..000000000
--- a/crates/ra_ide_api/tests/test/runnables.rs
+++ /dev/null
@@ -1,109 +0,0 @@
-use test_utils::assert_eq_dbg;
-
-use ra_ide_api::mock_analysis::analysis_and_position;
-
-#[test]
-fn test_runnables() {
-    let (analysis, pos) = analysis_and_position(
-        r#"
-        //- /lib.rs
-        <|> //empty
-        fn main() {}
-
-        #[test]
-        fn test_foo() {}
-
-        #[test]
-        #[ignore]
-        fn test_foo() {}
-        "#,
-    );
-    let runnables = analysis.runnables(pos.file_id).unwrap();
-    assert_eq_dbg(
-        r#"[Runnable { range: [1; 21), kind: Bin },
-                Runnable { range: [22; 46), kind: Test { name: "test_foo" } },
-                Runnable { range: [47; 81), kind: Test { name: "test_foo" } }]"#,
-        &runnables,
-    )
-}
-
-#[test]
-fn test_runnables_module() {
-    let (analysis, pos) = analysis_and_position(
-        r#"
-        //- /lib.rs
-        <|> //empty
-        mod test_mod {
-            #[test]
-            fn test_foo1() {}
-        }
-        "#,
-    );
-    let runnables = analysis.runnables(pos.file_id).unwrap();
-    assert_eq_dbg(
-        r#"[Runnable { range: [1; 59), kind: TestMod { path: "test_mod" } },
-                Runnable { range: [28; 57), kind: Test { name: "test_foo1" } }]"#,
-        &runnables,
-    )
-}
-
-#[test]
-fn test_runnables_one_depth_layer_module() {
-    let (analysis, pos) = analysis_and_position(
-        r#"
-        //- /lib.rs
-        <|> //empty
-        mod foo {
-            mod test_mod {
-                #[test]
-                fn test_foo1() {}
-            }
-        }
-        "#,
-    );
-    let runnables = analysis.runnables(pos.file_id).unwrap();
-    assert_eq_dbg(
-        r#"[Runnable { range: [23; 85), kind: TestMod { path: "foo::test_mod" } },
-                Runnable { range: [46; 79), kind: Test { name: "test_foo1" } }]"#,
-        &runnables,
-    )
-}
-
-#[test]
-fn test_runnables_multiple_depth_module() {
-    let (analysis, pos) = analysis_and_position(
-        r#"
-        //- /lib.rs
-        <|> //empty
-        mod foo {
-            mod bar {
-                mod test_mod {
-                    #[test]
-                    fn test_foo1() {}
-                }
-            }
-        }
-        "#,
-    );
-    let runnables = analysis.runnables(pos.file_id).unwrap();
-    assert_eq_dbg(
-        r#"[Runnable { range: [41; 115), kind: TestMod { path: "foo::bar::test_mod" } },
-                Runnable { range: [68; 105), kind: Test { name: "test_foo1" } }]"#,
-        &runnables,
-    )
-}
-
-#[test]
-fn test_runnables_no_test_function_in_module() {
-    let (analysis, pos) = analysis_and_position(
-        r#"
-        //- /lib.rs
-        <|> //empty
-        mod test_mod {
-            fn foo1() {}
-        }
-        "#,
-    );
-    let runnables = analysis.runnables(pos.file_id).unwrap();
-    assert_eq_dbg(r#"[]"#, &runnables)
-}
diff --git a/crates/ra_ide_api/tests/test/snapshots/test__unresolved_module_diagnostic.snap b/crates/ra_ide_api/tests/test/snapshots/test__unresolved_module_diagnostic.snap
new file mode 100644
index 000000000..1b41e2b00
--- /dev/null
+++ b/crates/ra_ide_api/tests/test/snapshots/test__unresolved_module_diagnostic.snap
@@ -0,0 +1,26 @@
+Created: 2019-01-15T11:15:20.891129945+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api/tests/test/main.rs
+
+[
+    Diagnostic {
+        message: "unresolved module",
+        range: [4; 7),
+        fix: Some(
+            SourceChange {
+                label: "create module",
+                source_file_edits: [],
+                file_system_edits: [
+                    CreateFile {
+                        source_root: SourceRootId(
+                            0
+                        ),
+                        path: "foo.rs"
+                    }
+                ],
+                cursor_position: None
+            }
+        ),
+        severity: Error
+    }
+]
diff --git a/crates/ra_ide_api_light/Cargo.toml b/crates/ra_ide_api_light/Cargo.toml
index 8c192fca6..16cf228e7 100644
--- a/crates/ra_ide_api_light/Cargo.toml
+++ b/crates/ra_ide_api_light/Cargo.toml
@@ -17,3 +17,4 @@ ra_text_edit = { path = "../ra_text_edit" }
 [dev-dependencies]
 test_utils = { path = "../test_utils" }
 proptest = "0.8.7"
+insta = "0.1.4"
diff --git a/crates/ra_ide_api_light/src/lib.rs b/crates/ra_ide_api_light/src/lib.rs
index 72fba9402..9dd72701d 100644
--- a/crates/ra_ide_api_light/src/lib.rs
+++ b/crates/ra_ide_api_light/src/lib.rs
@@ -132,8 +132,9 @@ pub fn syntax_tree(file: &SourceFile) -> String {
 #[cfg(test)]
 mod tests {
     use ra_syntax::AstNode;
+    use insta::assert_debug_snapshot_matches;
 
-    use crate::test_utils::{add_cursor, assert_eq_dbg, assert_eq_text, extract_offset};
+    use crate::test_utils::{add_cursor, assert_eq_text, extract_offset};
 
     use super::*;
 
@@ -147,15 +148,7 @@ fn main() {}
 "#,
         );
         let hls = highlight(file.syntax());
-        assert_eq_dbg(
-            r#"[HighlightedRange { range: [1; 11), tag: "comment" },
-                HighlightedRange { range: [12; 14), tag: "keyword" },
-                HighlightedRange { range: [15; 19), tag: "function" },
-                HighlightedRange { range: [29; 37), tag: "macro" },
-                HighlightedRange { range: [38; 50), tag: "string" },
-                HighlightedRange { range: [52; 54), tag: "literal" }]"#,
-            &hls,
-        );
+        assert_debug_snapshot_matches!("highlighting", hls);
     }
 
     #[test]
diff --git a/crates/ra_ide_api_light/src/snapshots/tests__file_structure.snap b/crates/ra_ide_api_light/src/snapshots/tests__file_structure.snap
new file mode 100644
index 000000000..10eb5c724
--- /dev/null
+++ b/crates/ra_ide_api_light/src/snapshots/tests__file_structure.snap
@@ -0,0 +1,80 @@
+Created: 2019-01-15T11:15:21.073862814+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api_light/src/structure.rs
+
+[
+    StructureNode {
+        parent: None,
+        label: "Foo",
+        navigation_range: [8; 11),
+        node_range: [1; 26),
+        kind: STRUCT_DEF
+    },
+    StructureNode {
+        parent: Some(
+            0
+        ),
+        label: "x",
+        navigation_range: [18; 19),
+        node_range: [18; 24),
+        kind: NAMED_FIELD_DEF
+    },
+    StructureNode {
+        parent: None,
+        label: "m",
+        navigation_range: [32; 33),
+        node_range: [28; 53),
+        kind: MODULE
+    },
+    StructureNode {
+        parent: Some(
+            2
+        ),
+        label: "bar",
+        navigation_range: [43; 46),
+        node_range: [40; 51),
+        kind: FN_DEF
+    },
+    StructureNode {
+        parent: None,
+        label: "E",
+        navigation_range: [60; 61),
+        node_range: [55; 75),
+        kind: ENUM_DEF
+    },
+    StructureNode {
+        parent: None,
+        label: "T",
+        navigation_range: [81; 82),
+        node_range: [76; 88),
+        kind: TYPE_DEF
+    },
+    StructureNode {
+        parent: None,
+        label: "S",
+        navigation_range: [96; 97),
+        node_range: [89; 108),
+        kind: STATIC_DEF
+    },
+    StructureNode {
+        parent: None,
+        label: "C",
+        navigation_range: [115; 116),
+        node_range: [109; 127),
+        kind: CONST_DEF
+    },
+    StructureNode {
+        parent: None,
+        label: "impl E",
+        navigation_range: [134; 135),
+        node_range: [129; 138),
+        kind: IMPL_BLOCK
+    },
+    StructureNode {
+        parent: None,
+        label: "impl fmt::Debug for E",
+        navigation_range: [160; 161),
+        node_range: [140; 164),
+        kind: IMPL_BLOCK
+    }
+]
diff --git a/crates/ra_ide_api_light/src/snapshots/tests__highlighting.snap b/crates/ra_ide_api_light/src/snapshots/tests__highlighting.snap
new file mode 100644
index 000000000..d8f44a713
--- /dev/null
+++ b/crates/ra_ide_api_light/src/snapshots/tests__highlighting.snap
@@ -0,0 +1,30 @@
+Created: 2019-01-15T11:15:21.073858657+00:00
+Creator: [email protected]
+Source: crates/ra_ide_api_light/src/lib.rs
+
+[
+    HighlightedRange {
+        range: [1; 11),
+        tag: "comment"
+    },
+    HighlightedRange {
+        range: [12; 14),
+        tag: "keyword"
+    },
+    HighlightedRange {
+        range: [15; 19),
+        tag: "function"
+    },
+    HighlightedRange {
+        range: [29; 37),
+        tag: "macro"
+    },
+    HighlightedRange {
+        range: [38; 50),
+        tag: "string"
+    },
+    HighlightedRange {
+        range: [52; 54),
+        tag: "literal"
+    }
+]
diff --git a/crates/ra_ide_api_light/src/structure.rs b/crates/ra_ide_api_light/src/structure.rs
index 8bd57555f..3c6f39e16 100644
--- a/crates/ra_ide_api_light/src/structure.rs
+++ b/crates/ra_ide_api_light/src/structure.rs
@@ -87,7 +87,7 @@ fn structure_node(node: &SyntaxNode) -> Option<StructureNode> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use test_utils::assert_eq_dbg;
+    use insta::assert_debug_snapshot_matches;
 
     #[test]
     fn test_file_structure() {
@@ -112,18 +112,6 @@ impl fmt::Debug for E {}
 "#,
         );
         let structure = file_structure(&file);
-        assert_eq_dbg(
-            r#"[StructureNode { parent: None, label: "Foo", navigation_range: [8; 11), node_range: [1; 26), kind: STRUCT_DEF },
-                StructureNode { parent: Some(0), label: "x", navigation_range: [18; 19), node_range: [18; 24), kind: NAMED_FIELD_DEF },
-                StructureNode { parent: None, label: "m", navigation_range: [32; 33), node_range: [28; 53), kind: MODULE },
-                StructureNode { parent: Some(2), label: "bar", navigation_range: [43; 46), node_range: [40; 51), kind: FN_DEF },
-                StructureNode { parent: None, label: "E", navigation_range: [60; 61), node_range: [55; 75), kind: ENUM_DEF },
-                StructureNode { parent: None, label: "T", navigation_range: [81; 82), node_range: [76; 88), kind: TYPE_DEF },
-                StructureNode { parent: None, label: "S", navigation_range: [96; 97), node_range: [89; 108), kind: STATIC_DEF },
-                StructureNode { parent: None, label: "C", navigation_range: [115; 116), node_range: [109; 127), kind: CONST_DEF },
-                StructureNode { parent: None, label: "impl E", navigation_range: [134; 135), node_range: [129; 138), kind: IMPL_BLOCK },
-                StructureNode { parent: None, label: "impl fmt::Debug for E", navigation_range: [160; 161), node_range: [140; 164), kind: IMPL_BLOCK }]"#,
-            &structure,
-        )
+        assert_debug_snapshot_matches!("file_structure", structure);
     }
 }
diff --git a/crates/test_utils/src/lib.rs b/crates/test_utils/src/lib.rs
index 9b1c9c9a0..6489033dd 100644
--- a/crates/test_utils/src/lib.rs
+++ b/crates/test_utils/src/lib.rs
@@ -1,8 +1,6 @@
-use std::fmt;
 use std::fs;
 use std::path::{Path, PathBuf};
 
-use itertools::Itertools;
 use text_unit::{TextRange, TextUnit};
 use serde_json::Value;
 
@@ -31,12 +29,6 @@ macro_rules! assert_eq_text {
     }};
 }
 
-pub fn assert_eq_dbg(expected: &str, actual: &impl fmt::Debug) {
-    let actual = format!("{:?}", actual);
-    let expected = expected.lines().map(|l| l.trim()).join(" ");
-    assert_eq!(expected, actual);
-}
-
 pub fn extract_offset(text: &str) -> (TextUnit, String) {
     match try_extract_offset(text) {
         None => panic!("text should contain cursor marker"),