fix: app cmd parsing, usage & tests

Note: the integration tests don't work due to ValidateApp still
attempting to validate the host key for the test app which doesn't
exist. This will be fixed in a future commit.

cli/app/cmd_test.go

@@ -0,0 +1,31 @@
+package app
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestParseCmdArgs(t *testing.T) {
+	tests := []struct {
+		input          []string
+		shouldParse    bool
+		expectedOutput string
+	}{
+		// `--` is not parsed when passed in from the command-line e.g. -- foo bar baz
+		// so we need to eumlate that as missing when testing if bash args are passed in
+		// see https://git.coopcloud.tech/coop-cloud/organising/issues/336 for more
+		{[]string{"foo.com", "app", "test"}, false, ""},
+		{[]string{"foo.com", "app", "test", "foo"}, true, "foo "},
+		{[]string{"foo.com", "app", "test", "foo", "bar", "baz"}, true, "foo bar baz "},
+	}
+
+	for _, test := range tests {
+		ok, parsed := parseCmdArgs(test.input, false)
+		if ok != test.shouldParse {
+			t.Fatalf("[%s] should not parse", strings.Join(test.input, " "))
+		}
+		if parsed != test.expectedOutput {
+			t.Fatalf("%s does not match %s", parsed, test.expectedOutput)
+		}
+	}
+}