tool/gocross: a tool for building Tailscale binaries

Signed-off-by: David Anderson <danderson@tailscale.com>
2023-02-21 16:07:33 -08:00
parent 0b8f89c79c
commit 860734aed9
12 changed files with 1324 additions and 78 deletions
@@ -0,0 +1,99 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+package main
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestEnv(t *testing.T) {
+
+	var (
+		init = map[string]string{
+			"FOO": "bar",
+		}
+
+		wasSet   = map[string]string{}
+		wasUnset = map[string]bool{}
+
+		setenv = func(k, v string) error {
+			wasSet[k] = v
+			return nil
+		}
+		unsetenv = func(k string) error {
+			wasUnset[k] = true
+			return nil
+		}
+	)
+
+	env := newEnvironmentForTest(init, setenv, unsetenv)
+
+	if got, want := env.Get("FOO", ""), "bar"; got != want {
+		t.Errorf(`env.Get("FOO") = %q, want %q`, got, want)
+	}
+	if got, want := env.IsSet("FOO"), true; got != want {
+		t.Errorf(`env.IsSet("FOO") = %v, want %v`, got, want)
+	}
+
+	if got, want := env.Get("BAR", "defaultVal"), "defaultVal"; got != want {
+		t.Errorf(`env.Get("BAR") = %q, want %q`, got, want)
+	}
+	if got, want := env.IsSet("BAR"), false; got != want {
+		t.Errorf(`env.IsSet("BAR") = %v, want %v`, got, want)
+	}
+
+	env.Set("BAR", "quux")
+	if got, want := env.Get("BAR", ""), "quux"; got != want {
+		t.Errorf(`env.Get("BAR") = %q, want %q`, got, want)
+	}
+	if got, want := env.IsSet("BAR"), true; got != want {
+		t.Errorf(`env.IsSet("BAR") = %v, want %v`, got, want)
+	}
+	diff := "BAR=quux (was <nil>)"
+	if got := env.Diff(); got != diff {
+		t.Errorf("env.Diff() = %q, want %q", got, diff)
+	}
+
+	env.Set("FOO", "foo2")
+	if got, want := env.Get("FOO", ""), "foo2"; got != want {
+		t.Errorf(`env.Get("FOO") = %q, want %q`, got, want)
+	}
+	if got, want := env.IsSet("FOO"), true; got != want {
+		t.Errorf(`env.IsSet("FOO") = %v, want %v`, got, want)
+	}
+	diff = `BAR=quux (was <nil>)
+FOO=foo2 (was bar)`
+	if got := env.Diff(); got != diff {
+		t.Errorf("env.Diff() = %q, want %q", got, diff)
+	}
+
+	env.Unset("FOO")
+	if got, want := env.Get("FOO", "default"), "default"; got != want {
+		t.Errorf(`env.Get("FOO") = %q, want %q`, got, want)
+	}
+	if got, want := env.IsSet("FOO"), false; got != want {
+		t.Errorf(`env.IsSet("FOO") = %v, want %v`, got, want)
+	}
+	diff = `BAR=quux (was <nil>)
+FOO=<nil> (was bar)`
+	if got := env.Diff(); got != diff {
+		t.Errorf("env.Diff() = %q, want %q", got, diff)
+	}
+
+	if err := env.Apply(); err != nil {
+		t.Fatalf("env.Apply() failed: %v", err)
+	}
+
+	wantSet := map[string]string{"BAR": "quux"}
+	wantUnset := map[string]bool{"FOO": true}
+
+	if diff := cmp.Diff(wasSet, wantSet); diff != "" {
+		t.Errorf("env.Apply didn't set as expected (-got+want):\n%s", diff)
+	}
+	if diff := cmp.Diff(wasUnset, wantUnset); diff != "" {
+		t.Errorf("env.Apply didn't unset as expected (-got+want):\n%s", diff)
+	}
+}