Test use of extvar and TLA importing

Author: Steve Harris

cmd/show_test.go

@@ -72,7 +72,7 @@ func TestShow(t *testing.T) {
 	for format, parser := range formats {
 		expected, err := parser(expected)
 		if err != nil {
-			t.Errorf("error parsing *expected* value: %s", err)
+			t.Fatalf("error parsing *expected* value: %v", err)
 		}
 
 		os.Setenv("anVar", "aVal2")
@@ -90,9 +90,54 @@ func TestShow(t *testing.T) {
 		t.Log("output is", output)
 		actual, err := parser(output)
 		if err != nil {
-			t.Errorf("error parsing output of format %s: %s", format, err)
+			t.Errorf("error parsing output of format %s: %v", format, err)
 		} else if !reflect.DeepEqual(expected, actual) {
 			t.Errorf("format %s expected != actual: %s != %s", format, expected, actual)
 		}
 	}
 }
+
+func TestShowUsingExtVarFiles(t *testing.T) {
+	expectedText := `
+{
+  "apiVersion": "v1",
+  "kind": "ConfigMap",
+  "metadata": {
+    "name": "sink"
+  },
+  "data": {
+    "input": {
+      "greeting": "Hello!",
+      "helper": true,
+      "top": true
+    },
+    "var": "I'm a var!"
+  }
+}
+`
+	var expected interface{}
+	if err := json.Unmarshal([]byte(expectedText), &expected); err != nil {
+		t.Fatalf("error parsing *expected* value: %v", err)
+	}
+
+	if err := os.Chdir("../testdata/extvars/feed"); err != nil {
+		t.Fatalf("failed to change to target directory: %v", err)
+	}
+
+	output := cmdOutput(t, []string{"show",
+		"top.jsonnet",
+		"-o", "json",
+		"--tla-code-file", "input=input.jsonnet",
+		"--tla-code-file", "sink=sink.jsonnet",
+		"--ext-str-file", "filevar=var.txt",
+	})
+
+	t.Log("output is", output)
+	var actual interface{}
+	err := json.Unmarshal([]byte(output), &actual)
+	if err != nil {
+		t.Errorf("error parsing output: %v", err)
+	} else if !reflect.DeepEqual(expected, actual) {
+		t.Errorf("expected != actual: %s != %s", expected, actual)
+	}
+}

testdata/extvars/feed/input.jsonnet

@@ -0,0 +1,5 @@
+local helper = import '../helper.jsonnet';
+
+{
+  greeting: 'Hello!',
+} + helper

testdata/extvars/feed/sink.jsonnet

@@ -0,0 +1,13 @@
+function(input)
+  assert input.top;
+  {
+    apiVersion: 'v1',
+    kind: 'ConfigMap',
+    metadata: {
+      name: 'sink',
+    },
+    data: {
+      input: input,
+      var: std.extVar('filevar'),
+    },
+  }

testdata/extvars/feed/top.jsonnet

@@ -0,0 +1,4 @@
+function(input, sink)
+  sink(input {
+    top: true,
+  })

testdata/extvars/feed/var.txt

@@ -0,0 +1 @@
+I'm a var!

testdata/extvars/helper.jsonnet

@@ -0,0 +1,3 @@
+{
+  helper: true,
+}