Fix LoadOutputCodeCache

1 files changed, 46 insertions, 0 deletions

diff --git a/deno_dir_test.go b/deno_dir_test.go
new file mode 100644
index 000000000..fa3d68aed
--- /dev/null
+++ b/deno_dir_test.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+	"io/ioutil"
+	"testing"
+)
+
+func SetCompileDirForTest(prefix string) {
+	dir, err := ioutil.TempDir("", prefix)
+	if err != nil {
+		panic(err)
+	}
+	CompileDir = dir
+}
+
+func TestLoadOutputCodeCache(t *testing.T) {
+	SetCompileDirForTest("TestLoadOutputCodeCache")
+
+	filename := "Hello.ts"
+	sourceCodeBuf := []byte("1+2")
+
+	cacheFn := CacheFileName(filename, sourceCodeBuf)
+
+	outputCode, err := LoadOutputCodeCache(filename, sourceCodeBuf)
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	if outputCode != "" {
+		t.Fatalf("Expected empty outputCode but got <<%s>>", outputCode)
+	}
+
+	// Now let's write to the cache file
+	err = ioutil.WriteFile(cacheFn, []byte("blah"), 0700)
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+
+	// Try it again.
+	outputCode, err = LoadOutputCodeCache(filename, sourceCodeBuf)
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	if outputCode != "blah" {
+		t.Fatalf("Bad outputCode but got <<%s>>", outputCode)
+	}
+}