2 files changed, 120 insertions, 2 deletions

diff --git a/editors/code/tests/unit/index.ts b/editors/code/tests/unit/index.ts
index 5165720b4..b7d8d2144 100644
--- a/editors/code/tests/unit/index.ts
+++ b/editors/code/tests/unit/index.ts
@@ -1,6 +1,6 @@
 import * as path from 'path';
-import Mocha from 'mocha';
-import glob from 'glob';
+import * as Mocha from 'mocha';
+import * as glob from 'glob';
 
 export function run(): Promise<void> {
     // Create the mocha test
diff --git a/editors/code/tests/unit/runnable_env.test.ts b/editors/code/tests/unit/runnable_env.test.ts
new file mode 100644
index 000000000..f2f53e91a
--- /dev/null
+++ b/editors/code/tests/unit/runnable_env.test.ts
@@ -0,0 +1,118 @@
+import * as assert from 'assert';
+import { prepareEnv } from '../../src/run';
+import { RunnableEnvCfg } from '../../src/config';
+import * as ra from '../../src/lsp_ext';
+
+function makeRunnable(label: string): ra.Runnable {
+    return {
+        label,
+        kind: "cargo",
+        args: {
+            cargoArgs: [],
+            executableArgs: []
+        }
+    };
+}
+
+function fakePrepareEnv(runnableName: string, config: RunnableEnvCfg): Record<string, string> {
+    const runnable = makeRunnable(runnableName);
+    return prepareEnv(runnable, config);
+}
+
+suite('Runnable env', () => {
+    test('Global config works', () => {
+        const binEnv = fakePrepareEnv("run project_name", { "GLOBAL": "g" });
+        assert.equal(binEnv["GLOBAL"], "g");
+
+        const testEnv = fakePrepareEnv("test some::mod::test_name", { "GLOBAL": "g" });
+        assert.equal(testEnv["GLOBAL"], "g");
+    });
+
+    test('null mask works', () => {
+        const config = [
+            {
+                env: { DATA: "data" }
+            }
+        ];
+        const binEnv = fakePrepareEnv("run project_name", config);
+        assert.equal(binEnv["DATA"], "data");
+
+        const testEnv = fakePrepareEnv("test some::mod::test_name", config);
+        assert.equal(testEnv["DATA"], "data");
+    });
+
+    test('order works', () => {
+        const config = [
+            {
+                env: { DATA: "data" }
+            },
+            {
+                env: { DATA: "newdata" }
+            }
+        ];
+        const binEnv = fakePrepareEnv("run project_name", config);
+        assert.equal(binEnv["DATA"], "newdata");
+
+        const testEnv = fakePrepareEnv("test some::mod::test_name", config);
+        assert.equal(testEnv["DATA"], "newdata");
+    });
+
+    test('mask works', () => {
+        const config = [
+            {
+                env: { DATA: "data" }
+            },
+            {
+                mask: "^run",
+                env: { DATA: "rundata" }
+            },
+            {
+                mask: "special_test$",
+                env: { DATA: "special_test" }
+            }
+        ];
+        const binEnv = fakePrepareEnv("run project_name", config);
+        assert.equal(binEnv["DATA"], "rundata");
+
+        const testEnv = fakePrepareEnv("test some::mod::test_name", config);
+        assert.equal(testEnv["DATA"], "data");
+
+        const specialTestEnv = fakePrepareEnv("test some::mod::special_test", config);
+        assert.equal(specialTestEnv["DATA"], "special_test");
+    });
+
+    test('exact test name works', () => {
+        const config = [
+            {
+                env: { DATA: "data" }
+            },
+            {
+                mask: "some::mod::test_name",
+                env: { DATA: "test special" }
+            }
+        ];
+        const testEnv = fakePrepareEnv("test some::mod::test_name", config);
+        assert.equal(testEnv["DATA"], "test special");
+
+        const specialTestEnv = fakePrepareEnv("test some::mod::another_test", config);
+        assert.equal(specialTestEnv["DATA"], "data");
+    });
+
+    test('test mod name works', () => {
+        const config = [
+            {
+                env: { DATA: "data" }
+            },
+            {
+                mask: "some::mod",
+                env: { DATA: "mod special" }
+            }
+        ];
+        const testEnv = fakePrepareEnv("test some::mod::test_name", config);
+        assert.equal(testEnv["DATA"], "mod special");
+
+        const specialTestEnv = fakePrepareEnv("test some::mod::another_test", config);
+        assert.equal(specialTestEnv["DATA"], "mod special");
+    });
+
+});