Improve scenario when `<TAG>` was not given to `hub release`

commands/release.go

@@ -21,6 +21,7 @@ release [--include-drafts] [--exclude-prereleases] [-L <LIMIT>]
 release show <TAG>
 release create [-dpoc] [-a <FILE>] [-m <MESSAGE>|-F <FILE>] [-t <TARGET>] <TAG>
 release edit [<options>] <TAG>
+release download <TAG>
 release delete <TAG>
 `,
 		Long: `Manage GitHub releases.
@@ -303,7 +304,7 @@ func formatRelease(release github.Release, format string, colorize bool) string
 func showRelease(cmd *Command, args *Args) {
 	tagName := cmd.Arg(0)
 	if tagName == "" {
-		utils.Check(fmt.Errorf("Missing argument TAG"))
+		utils.Check(fmt.Errorf(cmdRelease.Synopsis()))
 	}
 
 	localRepo, err := github.LocalRepo()
@@ -344,7 +345,7 @@ func showRelease(cmd *Command, args *Args) {
 func downloadRelease(cmd *Command, args *Args) {
 	tagName := cmd.Arg(0)
 	if tagName == "" {
-		utils.Check(fmt.Errorf("Missing argument TAG"))
+		utils.Check(fmt.Errorf(cmdRelease.Synopsis()))
 	}
 
 	localRepo, err := github.LocalRepo()
@@ -390,7 +391,7 @@ func downloadReleaseAsset(asset github.ReleaseAsset, gh *github.Client) (err err
 func createRelease(cmd *Command, args *Args) {
 	tagName := cmd.Arg(0)
 	if tagName == "" {
-		utils.Check(fmt.Errorf("Missing argument TAG"))
+		utils.Check(fmt.Errorf(cmdRelease.Synopsis()))
 		return
 	}
 
@@ -459,7 +460,7 @@ text is the title and the rest is the description.`, tagName, project))
 func editRelease(cmd *Command, args *Args) {
 	tagName := cmd.Arg(0)
 	if tagName == "" {
-		utils.Check(fmt.Errorf("Missing argument TAG"))
+		utils.Check(fmt.Errorf(cmdRelease.Synopsis()))
 		return
 	}
 
@@ -542,7 +543,7 @@ text is the title and the rest is the description.`, tagName, project))
 func deleteRelease(cmd *Command, args *Args) {
 	tagName := cmd.Arg(0)
 	if tagName == "" {
-		utils.Check(fmt.Errorf("Missing argument TAG"))
+		utils.Check(fmt.Errorf(cmdRelease.Synopsis()))
 		return
 	}
 

features/release.feature

@@ -320,6 +320,11 @@ MARKDOWN
       https://github.com/mislav/will_paginate/archive/v1.2.0.tar.gz\n
       """
 
+  Scenario: Show release no tag
+    When I run `hub release show`
+    Then the exit status should be 1
+    Then the stderr should contain "hub release show"
+
   Scenario: Create a release
     Given the GitHub API server:
       """
@@ -394,6 +399,11 @@ MARKDOWN
     Then the output should contain exactly ""
     And "open https://github.com/mislav/will_paginate/releases/v1.2.0" should be run
 
+  Scenario: Create release no tag
+    When I run `hub release create -m hello`
+    Then the exit status should be 1
+    Then the stderr should contain "hub release create"
+
   Scenario: Edit existing release
     Given the GitHub API server:
       """
@@ -469,6 +479,11 @@ MARKDOWN
       Attaching release asset `hello-1.2.0.tar.gz'...\n
       """
 
+  Scenario: Edit release no tag
+    When I run `hub release edit -m hello`
+    Then the exit status should be 1
+    Then the stderr should contain "hub release edit"
+
     Scenario: Download a release asset.
       Given the GitHub API server:
         """
@@ -512,6 +527,11 @@ MARKDOWN
           ASSET_TARBALL
           """
 
+  Scenario: Download release no tag
+    When I run `hub release download`
+    Then the exit status should be 1
+    Then the stderr should contain "hub release download"
+
   Scenario: Delete a release
     Given the GitHub API server:
       """