chore: import upstream snapshot with attribution

cmd/micro/cli/agent/preflight_test.go

@@ -0,0 +1,124 @@
+package agent
+
+import (
+	"bytes"
+	"errors"
+	"net"
+	"strings"
+	"testing"
+)
+
+type stubListener struct{}
+
+func (stubListener) Accept() (net.Conn, error) { return nil, errors.New("closed") }
+func (stubListener) Close() error              { return nil }
+func (stubListener) Addr() net.Addr            { return stubAddr(":8080") }
+
+type stubAddr string
+
+func (a stubAddr) Network() string { return "tcp" }
+func (a stubAddr) String() string  { return string(a) }
+
+func TestRunAgentPreflightPassesWithKeyAndFreePort(t *testing.T) {
+	deps := preflightDeps{
+		lookPath: func(name string) (string, error) { return "/usr/bin/" + name, nil },
+		commandOutput: func(name string, args ...string) ([]byte, error) {
+			return []byte("go version go1.24.0 linux/amd64\n"), nil
+		},
+		executable: func() (string, error) { return "/usr/local/bin/micro", nil },
+		getenv: func(key string) string {
+			if key == "ANTHROPIC_API_KEY" {
+				return "set"
+			}
+			return ""
+		},
+		listen: func(network, address string) (net.Listener, error) { return stubListener{}, nil },
+	}
+
+	var out bytes.Buffer
+	if err := runAgentPreflight(&out, deps); err != nil {
+		t.Fatalf("runAgentPreflight() error = %v", err)
+	}
+	got := out.String()
+	for _, want := range []string{"First-agent preflight", "✓ Go toolchain", "✓ micro binary", "✓ provider API key", "✓ local port :8080", "Ready for the first-agent walkthrough"} {
+		if !strings.Contains(got, want) {
+			t.Fatalf("output missing %q:\n%s", want, got)
+		}
+	}
+}
+
+func TestRunAgentPreflightReportsActionableFailures(t *testing.T) {
+	deps := preflightDeps{
+		lookPath:   func(name string) (string, error) { return "", errors.New("not found") },
+		executable: func() (string, error) { return "", errors.New("unknown") },
+		getenv:     func(key string) string { return "" },
+		listen:     func(network, address string) (net.Listener, error) { return nil, errors.New("in use") },
+	}
+
+	var out bytes.Buffer
+	err := runAgentPreflight(&out, deps)
+	if err == nil {
+		t.Fatal("runAgentPreflight() error = nil")
+	}
+	got := out.String()
+	for _, want := range []string{"✗ Go toolchain", "go was not found on PATH", "https://go.dev/doc/install", "docs/guides/your-first-agent.html", "✗ micro binary", "go run ./cmd/micro agent preflight", "✗ provider API key", "docs/guides/no-secret-first-agent.html", "docs/guides/debugging-agents.html#provider-failures", "✗ local port :8080", "lsof -i :8080", "micro run --address"} {
+		if !strings.Contains(got, want) {
+			t.Fatalf("output missing %q:\n%s", want, got)
+		}
+	}
+}
+
+func TestRunAgentPreflightReportsOldGoVersion(t *testing.T) {
+	deps := preflightDeps{
+		lookPath: func(name string) (string, error) { return "/usr/bin/" + name, nil },
+		commandOutput: func(name string, args ...string) ([]byte, error) {
+			return []byte("go version go1.23.9 linux/amd64\n"), nil
+		},
+		executable: func() (string, error) { return "/usr/local/bin/micro", nil },
+		getenv: func(key string) string {
+			if key == "ANTHROPIC_API_KEY" {
+				return "set"
+			}
+			return ""
+		},
+		listen: func(network, address string) (net.Listener, error) { return stubListener{}, nil },
+	}
+
+	var out bytes.Buffer
+	err := runAgentPreflight(&out, deps)
+	if err == nil {
+		t.Fatal("runAgentPreflight() error = nil")
+	}
+	got := out.String()
+	for _, want := range []string{"✗ Go toolchain", "go1.23.9", "Upgrade to Go 1.24 or newer", "Rerun micro agent preflight"} {
+		if !strings.Contains(got, want) {
+			t.Fatalf("output missing %q:\n%s", want, got)
+		}
+	}
+}
+
+func TestGoVersionAtLeast(t *testing.T) {
+	tests := []struct {
+		line string
+		want bool
+	}{
+		{line: "go version go1.24.0 linux/amd64", want: true},
+		{line: "go version go1.25.1 linux/amd64", want: true},
+		{line: "go version go1.23.9 linux/amd64", want: false},
+		{line: "unexpected", want: false},
+	}
+	for _, tt := range tests {
+		if got := goVersionAtLeast(tt.line, 1, 24); got != tt.want {
+			t.Fatalf("goVersionAtLeast(%q) = %v, want %v", tt.line, got, tt.want)
+		}
+	}
+}
+
+func TestFirstLine(t *testing.T) {
+	if got := firstLine([]byte("one\ntwo")); got != "one" {
+		t.Fatalf("firstLine() = %q", got)
+	}
+	if got := firstLine([]byte(" single ")); got != "single" {
+		t.Fatalf("firstLine() = %q", got)
+	}
+}