Move tests around to shorter paths

.vscode/launch.template.json

@@ -17,6 +17,17 @@
             ],
             "autoAttachChildProcesses": true,
             "preLaunchTask": "Watch for extension run"
+        },
+        {
+            "name": "Launch submodule test",
+            "type": "go",
+            "request": "launch",
+            "mode": "test",
+            "program": "${workspaceFolder}/internal/testrunner",
+            "args": [
+                "-test.run",
+                "TestSubmodule/${fileBasename}"
+            ]
         }
     ]
 }

internal/testrunner/compiler_runner_test.go

@@ -0,0 +1,50 @@
+package runner
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/bundled"
+	"github.com/microsoft/typescript-go/internal/core"
+	"github.com/microsoft/typescript-go/internal/repo"
+	"github.com/microsoft/typescript-go/internal/tspath"
+	"gotest.tools/v3/assert"
+)
+
+// Runs the new compiler tests and produces baselines (e.g. `test1.symbols`).
+func TestLocal(t *testing.T) { runCompilerTests(t, false) } //nolint:paralleltest
+
+// Runs the old compiler tests, and produces new baselines (e.g. `test1.symbols`)
+// and a diff between the new and old baselines (e.g. `test1.symbols.diff`).
+func TestSubmodule(t *testing.T) { runCompilerTests(t, true) } //nolint:paralleltest
+
+func runCompilerTests(t *testing.T, isSubmodule bool) {
+	t.Parallel()
+
+	if isSubmodule {
+		repo.SkipIfNoTypeScriptSubmodule(t)
+	}
+
+	if !bundled.Embedded {
+		// Without embedding, we'd need to read all of the lib files out from disk into the MapFS.
+		// Just skip this for now.
+		t.Skip("bundled files are not embedded")
+	}
+
+	runners := []*CompilerBaselineRunner{
+		NewCompilerBaselineRunner(TestTypeRegression, isSubmodule),
+		NewCompilerBaselineRunner(TestTypeConformance, isSubmodule),
+	}
+
+	var seenTests core.Set[string]
+	for _, runner := range runners {
+		for _, test := range runner.EnumerateTestFiles() {
+			test = tspath.GetBaseFileName(test)
+			assert.Assert(t, !seenTests.Has(test), "Duplicate test file: %s", test)
+			seenTests.Add(test)
+		}
+	}
+
+	for _, runner := range runners {
+		runner.RunTests(t)
+	}
+}