Add regression test for #4069

This may be brittle as it makes use of .gitattributes to override the
autocrlf setting in order to have an input file with Windows line
endings across multiple platforms.

config/loader_test.go

@@ -45,6 +45,36 @@ func TestLoadFile_badType(t *testing.T) {
 	}
 }
 
+func TestLoadFileWindowsLineEndings(t *testing.T) {
+	testFile := filepath.Join(fixtureDir, "windows-line-endings.tf")
+
+	contents, err := ioutil.ReadFile(testFile)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if !strings.Contains(string(contents), "\r\n") {
+		t.Fatalf("Windows line endings test file %s contains no windows line endings - this may be an autocrlf related issue.", testFile)
+	}
+
+	c, err := LoadFile(testFile)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if c == nil {
+		t.Fatal("config should not be nil")
+	}
+
+	if c.Dir != "" {
+		t.Fatalf("bad: %#v", c.Dir)
+	}
+
+	actual := resourcesStr(c.Resources)
+	if actual != strings.TrimSpace(windowsHeredocResourcesStr) {
+		t.Fatalf("bad:\n%s", actual)
+	}
+}
+
 func TestLoadFileHeredoc(t *testing.T) {
 	c, err := LoadFile(filepath.Join(fixtureDir, "heredoc.tf"))
 	if err != nil {
@@ -673,6 +703,11 @@ cloudstack_firewall[test] (x1)
   rule
 `
 
+const windowsHeredocResourcesStr = `
+aws_instance[test] (x1)
+  user_data
+`
+
 const heredocProvidersStr = `
 aws
   access_key

config/test-fixtures/.gitattributes

@@ -0,0 +1 @@
+windows-line-endings.tf   eol=crlf

config/test-fixtures/windows-line-endings.tf

@@ -0,0 +1,6 @@
+// This is a comment
+resource "aws_instance" "test" {
+    user_data = <<HEREDOC
+    test script
+HEREDOC
+}