support/testing/tests/package/test_swipl.py: new test

This commit adds a test case for the recently added swipl package. It
should have been part of commit
69710addd121a18ff662c5a6dcb1d8f329f39d69 ("package/swipl: new
package") but was forgotten.

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/test_swipl.py

@@ -0,0 +1,46 @@
+import os
+
+import infra.basetest
+
+
+class TestSWIPL(infra.basetest.BRTest):
+    rootfs_overlay = \
+        infra.filepath("tests/package/test_swipl/rootfs-overlay")
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        f"""
+        BR2_PACKAGE_SWIPL=y
+        BR2_ROOTFS_OVERLAY="{rootfs_overlay}"
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv5",
+                           kernel="builtin",
+                           options=["-initrd", cpio_file])
+        self.emulator.login()
+
+        # Check program executes.
+        cmd = "swipl --version"
+        self.assertRunOk(cmd)
+
+        # Check swipl fails when goal is false.
+        cmd = "swipl -g false"
+        _, exit_code = self.emulator.run(cmd)
+        self.assertNotEqual(exit_code, 0)
+
+        # Test output.
+        string = "Hello Buildroot !"
+        cmd = f"swipl -g 'writeln(\"{string}\")' -t halt"
+        output, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, 0)
+        self.assertEqual(output[0], string)
+
+        # Check the swipl demo file works (ex: "sam" likes "pizza").
+        cmd = "swipl -g '[swi(demo/likes)]' -g 'likes(sam,pizza)' -t halt"
+        self.assertRunOk(cmd)
+
+        # Run a more complex logic program (solve a sudoku).
+        cmd = "swipl -g top -t halt /root/sudoku.pl"
+        self.assertRunOk(cmd, timeout=10)

support/testing/tests/package/test_swipl/rootfs-overlay/root/sudoku.pl

@@ -0,0 +1,42 @@
+% taken from:
+% https://www.swi-prolog.org/pldoc/man?section=clpfd-sudoku
+
+:- use_module(library(clpfd)).
+
+sudoku(Rows) :-
+        length(Rows, 9), maplist(same_length(Rows), Rows),
+        append(Rows, Vs), Vs ins 1..9,
+        maplist(all_distinct, Rows),
+        transpose(Rows, Columns),
+        maplist(all_distinct, Columns),
+        Rows = [As,Bs,Cs,Ds,Es,Fs,Gs,Hs,Is],
+        blocks(As, Bs, Cs),
+        blocks(Ds, Es, Fs),
+        blocks(Gs, Hs, Is).
+
+blocks([], [], []).
+blocks([N1,N2,N3|Ns1], [N4,N5,N6|Ns2], [N7,N8,N9|Ns3]) :-
+        all_distinct([N1,N2,N3,N4,N5,N6,N7,N8,N9]),
+        blocks(Ns1, Ns2, Ns3).
+
+problem(1, [[_,_,_,_,_,_,_,_,_],
+            [_,_,_,_,_,3,_,8,5],
+            [_,_,1,_,2,_,_,_,_],
+            [_,_,_,5,_,7,_,_,_],
+            [_,_,4,_,_,_,1,_,_],
+            [_,9,_,_,_,_,_,_,_],
+            [5,_,_,_,_,_,_,7,3],
+            [_,_,2,_,1,_,_,_,_],
+            [_,_,_,_,4,_,_,_,9]]).
+
+top :- writeln("Sudoku solution:"),
+    problem(1, Rows), sudoku(Rows), maplist(portray_clause, Rows),
+    Rows = [[9, 8, 7, 6, 5, 4, 3, 2, 1],
+            [2, 4, 6, 1, 7, 3, 9, 8, 5],
+            [3, 5, 1, 9, 2, 8, 7, 4, 6],
+            [1, 2, 8, 5, 3, 7, 6, 9, 4],
+            [6, 3, 4, 8, 9, 2, 1, 5, 7],
+            [7, 9, 5, 4, 6, 1, 8, 3, 2],
+            [5, 1, 9, 2, 8, 6, 4, 7, 3],
+            [4, 7, 2, 3, 1, 9, 5, 6, 8],
+            [8, 6, 3, 7, 4, 5, 2, 1, 9]].