feat: 3626 add option enable license content; disable by default (#3631)

---------
Signed-off-by: Christopher Phillips <32073428+spiffcs@users.noreply.github.com>

test/cli/license_test.go

@@ -0,0 +1,45 @@
+package cli
+
+import "testing"
+
+func Test_Licenses(t *testing.T) {
+	testImage := getFixtureImage(t, "image-unknown-licenses")
+	tests := []struct {
+		name       string
+		args       []string
+		env        map[string]string
+		assertions []traitAssertion
+	}{
+		{
+			name: "licenses default with no content",
+			args: []string{"scan", "-o", "json", testImage, "--from", "docker-archive"},
+			env:  map[string]string{"SYFT_FORMAT_PRETTY": "true"},
+			assertions: []traitAssertion{
+				assertJsonReport,
+				assertUnknownLicenseContent(false),
+				assertSuccessfulReturnCode,
+			},
+		},
+
+		{
+			name: "licenses with content",
+			args: []string{"scan", "-o", "json", testImage, "--from", "docker-archive"},
+			env:  map[string]string{"SYFT_FORMAT_PRETTY": "true", "SYFT_LICENSE_INCLUDE_UNKNOWN_LICENSE_CONTENT": "true"},
+			assertions: []traitAssertion{
+				assertJsonReport,
+				assertUnknownLicenseContent(true),
+				assertSuccessfulReturnCode,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			cmd, stdout, stderr := runSyft(t, test.env, test.args...)
+			for _, traitFn := range test.assertions {
+				traitFn(t, stdout, stderr, cmd.ProcessState.ExitCode())
+			}
+			logOutputOnFailure(t, cmd, stdout, stderr)
+		})
+	}
+}