Fix OutputWriter Table not getting printed without headers

Author: Anuj Chaudhari

component/output.go

@@ -269,7 +269,9 @@ func renderListTable(ow *outputwriter) {
 // renderTable prints output as a table
 func renderTable(ow *outputwriter) {
 	// Filter keys and values based on dynamic keys
-	ow.keys, ow.values = filterDynamicColumns(ow.keys, ow.dynamicKeys, ow.values)
+	if len(ow.keys) != 0 {
+		ow.keys, ow.values = filterDynamicColumns(ow.keys, ow.dynamicKeys, ow.values)
+	}
 
 	table := tablewriter.NewWriter(ow.out)
 	table.SetBorder(false)

component/output_test.go

@@ -76,7 +76,7 @@ func TestNewOutputWriterTableWithTabularApproach(t *testing.T) {
   NAME  STATUS     AGE  
   foo   READY      1d   
   bar   Not READY  1d   
-		`,
+`,
 		},
 
 		{
@@ -88,20 +88,40 @@ func TestNewOutputWriterTableWithTabularApproach(t *testing.T) {
   NAME  STATUS     AGE  
   foo   READY      1d   
   bar   Not READY  1d   
+`,
+		},
+
+		{
+			"verify table without headers with 2 columns",
+			[]string{},
+			[]interface{}{[]interface{}{"foo", "READY"}, []interface{}{"bar", "Not READY"}},
+			`
+  foo  READY      
+  bar  Not READY  
+`,
+		},
+		{
+			"verify table without headers with 1 columns",
+			[]string{},
+			[]interface{}{[]interface{}{"row1"}, []interface{}{"row2"}, []interface{}{"row3"}},
+			`
+  row1  
+  row2  
+  row3  
 `,
 		},
 	}
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			var b bytes.Buffer
-			tab := NewOutputWriter(&b, string(TableOutputType), "NAME", "STATUS", "AGE")
+			tab := NewOutputWriter(&b, string(TableOutputType), tt.header...)
 			require.NotNil(t, tab)
 			for _, r := range tt.rows {
 				tab.AddRow(r.([]interface{})...)
 			}
 			tab.Render()
-			assert.Equal(t, strings.TrimSpace(tt.output), strings.TrimSpace(b.String()))
+			assert.Equal(t, strings.Replace(tt.output, "\n", "", 1), b.String())
 		})
 	}
 }