[PATCHv3 08/15] gdb/tui/testsuite: refactor new-layout.exp test

[Andrew Burgess <aburgess@redhat.com>]

This commit changes the gdb.tui/new-layout.exp test to make use of a
list of test descriptions, and a loop to check each description in
turn.  There's no change to what is actually tested after this commit.

In future commits I plan to add additional tests to this file, and
this will be easier now that all I have to do is add a new test
description to the list.
---
 gdb/testsuite/gdb.tui/new-layout.exp | 83 +++++++++++++++++++---------
 1 file changed, 56 insertions(+), 27 deletions(-)

diff --git a/gdb/testsuite/gdb.tui/new-layout.exp b/gdb/testsuite/gdb.tui/new-layout.exp
index 2b5e07db612..d3d34af7439 100644
--- a/gdb/testsuite/gdb.tui/new-layout.exp
+++ b/gdb/testsuite/gdb.tui/new-layout.exp
@@ -55,20 +55,39 @@ if { [tcl_version_at_least 8 6] } {
 	"Missing '\}' in layout specification"
 }
 
-gdb_test_no_output "tui new-layout example asm 1 status 0 cmd 1"
-
-gdb_test "help layout example" \
-    "Apply the \"example\" layout.*tui new-layout example asm 1 status 0 cmd 1"
-
-gdb_test_no_output "tui new-layout example2 {asm 1 status 0} 1 cmd 1"
-
-gdb_test "help layout example2" \
-    "Apply the \"example2\" layout.*tui new-layout example2 {asm 1 status 0} 1 cmd 1"
-
-gdb_test_no_output "tui new-layout h {-horizontal asm 1 src 1} 1 status 0 cmd 1"
+# Each entry of this list describes a layout, and some associated
+# tests.  The items within each entry are:
+# 1. layout name,
+# 2. a string used to create the layout,
+# 3. a list of boxes to check for once the layout is selected,
+# 4. a regexp to match against the whole screen contents, this
+#    can be empty to skip this check.
+set layouts \
+    [list \
+	 [list example "asm 1 status 0 cmd 1" \
+	      {{0 0 80 15}} "$hex <main>"] \
+	 [list example2 "{asm 1 status 0} 1 cmd 1" \
+	      {{0 0 80 15}} ""] \
+	 [list h "{-horizontal asm 1 src 1} 1 status 0 cmd 1" \
+	      {{0 0 40 15} {39 0 41 15}} \
+	      "$hex <main>.*21.*return 0"]]
+
+# Helper function to verify a list of boxes.
+proc check_boxes {boxes} {
+    set boxno 1
+    foreach box $boxes {
+	eval Term::check_box [list "box $boxno"] $box
+	incr boxno
+    }
+}
 
-gdb_test "help layout h" \
-    "Apply the \"h\" layout.*tui new-layout h {-horizontal asm 1 src 1} 1 status 0 cmd 1"
+# Now create the layouts.
+foreach layout $layouts {
+    lassign $layout name desc
+    gdb_test_no_output "tui new-layout $name $desc"
+    gdb_test "help layout $name" \
+	"Apply the \"$name\" layout.*tui new-layout $name $desc"
+}
 
 if {![Term::enter_tui]} {
     unsupported "TUI not supported"
@@ -79,20 +98,30 @@ set text [Term::get_all_lines]
 gdb_assert {![string match "No Source Available" $text]} \
     "initial source listing"
 
-Term::command "layout example"
-Term::check_contents "example layout shows assembly" \
-    "$hex <main>"
+foreach_with_prefix layout $layouts {
+    lassign $layout name desc boxes content_pattern
+
+    # Reset the layout to a known starting configuration.
+    Term::command "layout src"
+    Term::command "winheight cmd 8"
+
+    # Apply our test layout.
+    Term::command "layout $name"
+    check_boxes $boxes
 
-Term::command "layout h"
-Term::check_box "left window box" 0 0 40 15
-Term::check_box "right window box" 39 0 41 15
-Term::check_contents "horizontal display" \
-    "$hex <main>.*21.*return 0"
+    if {$content_pattern != ""} {
+	Term::check_contents "contents in layout $name" \
+	    "${content_pattern}"
+    }
 
-Term::command "winheight src - 5"
-Term::check_box "left window box after shrink" 0 0 40 10
-Term::check_box "right window box after shrink" 39 0 41 10
+    # Some additional tests for the 'h' layout.
+    if {$name == "h"} {
+	Term::command "winheight src - 5"
+	Term::check_box "left window box after shrink" 0 0 40 10
+	Term::check_box "right window box after shrink" 39 0 41 10
 
-Term::command "winheight src + 5"
-Term::check_box "left window box after grow" 0 0 40 15
-Term::check_box "right window box after grow" 39 0 41 15
+	Term::command "winheight src + 5"
+	Term::check_box "left window box after grow" 0 0 40 15
+	Term::check_box "right window box after grow" 39 0 41 15
+    }
+}
-- 
2.25.4