Add test cases for GETRANGE against integer-encoded strings

tests/unit/basic.tcl

@@ -563,39 +563,39 @@ start_server {tags {"basic"}} {
         assert_error "*maximum allowed size*" {r setrange mykey [expr 512*1024*1024-4] world}
     }
 
-    test {SUBSTR basics} {
-        set res {}
-        r set foo "Hello World"
-        lappend res [r substr foo 0 3]
-        lappend res [r substr foo 0 -1]
-        lappend res [r substr foo -4 -1]
-        lappend res [r substr foo 5 3]
-        lappend res [r substr foo 5 5000]
-        lappend res [r substr foo -5000 10000]
-        set _ $res
-    } {Hell {Hello World} orld {} { World} {Hello World}}
-
-    test {SUBSTR against integer encoded values} {
-        r set foo 123
-        r substr foo 0 -2
-    } {12}
-
-    test {SUBSTR fuzzing} {
-        set err {}
+    test "GETRANGE against non-existing key" {
+        r del mykey
+        assert_equal "" [r getrange mykey 0 -1]
+    }
+
+    test "GETRANGE against string value" {
+        r set mykey "Hello World"
+        assert_equal "Hell" [r getrange mykey 0 3]
+        assert_equal "Hello World" [r getrange mykey 0 -1]
+        assert_equal "orld" [r getrange mykey -4 -1]
+        assert_equal "" [r getrange mykey 5 3]
+        assert_equal " World" [r getrange mykey 5 5000]
+        assert_equal "Hello World" [r getrange mykey -5000 10000]
+    }
+
+    test "GETRANGE against integer-encoded value" {
+        r set mykey 1234
+        assert_equal "123" [r getrange mykey 0 2]
+        assert_equal "1234" [r getrange mykey 0 -1]
+        assert_equal "234" [r getrange mykey -3 -1]
+        assert_equal "" [r getrange mykey 5 3]
+        assert_equal "4" [r getrange mykey 3 5000]
+        assert_equal "1234" [r getrange mykey -5000 10000]
+    }
+
+    test "GETRANGE fuzzing" {
         for {set i 0} {$i < 1000} {incr i} {
-            set bin [randstring 0 1024 binary]
+            r set bin [set bin [randstring 0 1024 binary]]
             set _start [set start [randomInt 1500]]
             set _end [set end [randomInt 1500]]
             if {$_start < 0} {set _start "end-[abs($_start)-1]"}
             if {$_end < 0} {set _end "end-[abs($_end)-1]"}
-            set s1 [string range $bin $_start $_end]
-            r set bin $bin
-            set s2 [r substr bin $start $end]
-            if {$s1 != $s2} {
-                set err "String mismatch"
-                break
-            }
+            assert_equal [string range $bin $_start $_end] [r getrange bin $start $end]
         }
-        set _ $err
-    } {}
+    }
 }