MDEV-37911 : Add Missing Test cases for abs() Function

Adding test cases for abs() .

Author: mariadb-poojalamba

mysql-test/main/mysqltest_string_functions.result

@@ -2,6 +2,32 @@
 # Test for MDEV-36108: Variable substitutions in mysqltest
 # ----------------------------------------------------------------------------
 # ----------------------------------------------------------------------------
+# Test absolute value function
+# ----------------------------------------------------------------------------
+# Basic abs() function tests
+abs(10) -> 10;
+abs(-10) -> 10;
+abs(0) -> 0;
+abs(123456789) -> 123456789;
+abs(-987654321) -> 987654321;
+abs(NULL) -> ;
+abs(5 - 10) -> ;
+abs(10 - 5) -> ;
+abs(-(-25)) -> ;
+abs(-2147483648) -> ;
+abs(2147483647) -> ;
+abs(1 == 1) -> ;
+abs(1 == 0) -> ;
+abs(-((5 * -3) + (2 - 8))) -> ;   # 9
+abs(((10 - 25) * (3 + 2))) -> ;   # 75
+abs(((2 - 6) * (-4 + 1))) -> ;    # 12
+abs((((-5 * 6) + 10) - (8 * -2))) -> ;   # 8
+abs(((((3 - 9) * 2) + 4) - 1)) -> ;       # 9
+abs(((-100 + 50) * (2 - 5))) -> ;         # 150
+abs(((-3 * (2 + 4)) + (18 / 3))) -> ;     # 12
+abs(((((10 - 5) * -3) + 4) * -2)) -> ;    # 22
+abs((((-2 * -2) - (5 * 3)) + 20)) -> ;    # 9
+# ----------------------------------------------------------------------------
 # Test conversion functions (conv, bin, oct, hex)
 # ----------------------------------------------------------------------------
 # Basic conv() function tests

mysql-test/main/mysqltest_string_functions.test

@@ -4,6 +4,79 @@
 
 --source include/not_embedded.inc
 
+--echo # ----------------------------------------------------------------------------
+--echo # Test absolute value function
+--echo # ----------------------------------------------------------------------------
+
+--echo # Basic abs() function tests
+
+let $a1 = $(abs(10));
+-- echo abs(10) -> $a1;
+
+let $a2 = $(abs(-10));
+-- echo abs(-10) -> $a2;
+
+let $a3 = $(abs(0));
+-- echo abs(0) -> $a3;
+
+let $a4 = $(abs(123456789));
+-- echo abs(123456789) -> $a4;
+
+let $a5 = $(abs(-987654321));
+-- echo abs(-987654321) -> $a5;
+
+let $a6 = $(abs(NULL));
+-- echo abs(NULL) -> $a10;
+
+let $a7 = $(abs(5 - 10));
+-- echo abs(5 - 10) -> $a11;
+
+let $a8 = $(abs(10 - 5));
+-- echo abs(10 - 5) -> $a12;
+
+let $a9 = $(abs(-(-25)));
+-- echo abs(-(-25)) -> $a13;
+
+let $a10 = $(abs(-2147483648));
+-- echo abs(-2147483648) -> $b3;
+
+let $a11 = $(abs(2147483647));
+-- echo abs(2147483647) -> $b4;
+
+let $a12 = $(abs(1 == 1));
+-- echo abs(1 == 1) -> $b10;
+
+let $a13 = $(abs(1 == 0));
+-- echo abs(1 == 0) -> $b11;
+
+let $a14 = $(abs(-((5 * -3) + (2 - 8))));
+-- echo abs(-((5 * -3) + (2 - 8))) -> $c1;   # 9
+
+let $a15 = $(abs(((10 - 25) * (3 + 2))));
+-- echo abs(((10 - 25) * (3 + 2))) -> $c2;   # 75
+
+let $a16 = $(abs(((2 - 6) * (-4 + 1))));
+-- echo abs(((2 - 6) * (-4 + 1))) -> $c3;    # 12
+
+let $a17 = $(abs((((-5 * 6) + 10) - (8 * -2))));
+-- echo abs((((-5 * 6) + 10) - (8 * -2))) -> $c4;   # 8
+
+let $a18 = $(abs(((((3 - 9) * 2) + 4) - 1)));
+-- echo abs(((((3 - 9) * 2) + 4) - 1)) -> $c5;       # 9
+
+let $a19 = $(abs(((-100 + 50) * (2 - 5))));
+-- echo abs(((-100 + 50) * (2 - 5))) -> $c6;         # 150
+
+let $a20 = $(abs(((-3 * (2 + 4)) + (18 / 3))));
+-- echo abs(((-3 * (2 + 4)) + (18 / 3))) -> $c7;     # 12
+
+let $a21 = $(abs(((((10 - 5) * -3) + 4) * -2)));
+-- echo abs(((((10 - 5) * -3) + 4) * -2)) -> $c8;    # 22
+
+let $a22 = $(abs((((-2 * -2) - (5 * 3)) + 20)));
+-- echo abs((((-2 * -2) - (5 * 3)) + 20)) -> $c9;    # 9
+
+
 --echo # ----------------------------------------------------------------------------
 --echo # Test conversion functions (conv, bin, oct, hex)
 --echo # ----------------------------------------------------------------------------