Add suite for testing filewatch.

Currently expects windows events.

test/suite-filewatch.janet

@@ -0,0 +1,108 @@
+# Copyright (c) 2024 Calvin Rose
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+(import ./helper :prefix "" :exit true)
+(start-suite)
+
+(assert true)
+
+(def chan (ev/chan 1000))
+
+# Test GC
+(assert-no-error "filewatch/new" (filewatch/new chan))
+(gccollect)
+
+(defn- expect
+  [key value]
+  (ev/with-deadline
+    1
+    (def event (ev/take chan))
+    (when is-verbose (pp event))
+    (assert event "check event")
+    (assert (= value (get event key)) (string/format "got %p, exepcted %p" (get event key) value))))
+
+(defn- expect-empty
+  []
+  (assert (zero? (ev/count chan)) "channel check empty")
+  (ev/sleep 0) # turn the event loop
+  (assert (zero? (ev/count chan)) "channel check empty"))
+
+(defn spit-file
+  [dir name]
+  (def path (string dir "/" name))
+  (spit path "test text"))
+
+# Create a file watcher on two test directories
+(def fw (filewatch/new chan))
+(def td1 (randdir))
+(def td2 (randdir))
+(os/mkdir td1)
+(os/mkdir td2)
+(filewatch/add fw td1 :last-write :last-access :file-name :dir-name :size :attributes :recursive)
+(filewatch/add fw td2 :last-write :last-access :file-name :dir-name :size :attributes)
+(assert-no-error "filewatch/listen no error" (filewatch/listen fw))
+
+# Simulate some file event
+(spit-file td1 "file1.txt")
+(expect :action :added)
+(expect :action :modified)
+(expect-empty)
+(gccollect)
+(spit-file td1 "file1.txt")
+(expect :action :modified)
+(expect :action :modified)
+(expect-empty)
+(gccollect)
+
+# Check td2
+(spit-file td2 "file2.txt")
+(expect :action :added)
+(expect :action :modified)
+(expect-empty)
+
+# Remove a file, then wait for remove event
+(rmrf (string td1 "/file1.txt"))
+(expect :action :removed)
+(expect-empty)
+
+# Unlisten to some events
+(filewatch/remove fw td2)
+
+# Check that we don't get anymore events from test directory 2
+(spit-file td2 "file2.txt")
+(expect-empty)
+
+# Repeat and things should still work with test directory 1
+(spit-file td1 "file1.txt")
+(expect :action :added)
+(expect :action :modified)
+(expect-empty)
+(gccollect)
+(spit-file td1 "file1.txt")
+(expect :action :modified)
+(expect :action :modified)
+(expect-empty)
+(gccollect)
+
+(assert-no-error "filewatch/unlisten no error" (filewatch/unlisten fw))
+(assert-no-error "cleanup 1" (rmrf td1))
+(assert-no-error "cleanup 2" (rmrf td2))
+
+(end-suite)