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spec/util_events_spec.lua @ 12660:e8f57970ced5
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| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Mon, 15 Aug 2022 16:36:00 +0200 |
| parent | 11060:19dd9522f107 |
| rev | line source |
|---|---|
| 8760 | 1 local events = require "util.events"; |
| 2 | |
| 3 describe("util.events", function () | |
| 4 it("should export a new() function", function () | |
| 5 assert.is_function(events.new); | |
| 6 end); | |
| 7 describe("new()", function () | |
| 8 it("should return return a new events object", function () | |
| 9 local e = events.new(); | |
| 10 assert.is_function(e.add_handler); | |
| 11 assert.is_function(e.remove_handler); | |
| 12 end); | |
| 13 end); | |
| 14 | |
| 15 local e, h; | |
| 16 | |
| 17 | |
| 18 describe("API", function () | |
| 19 before_each(function () | |
| 20 e = events.new(); | |
| 21 h = spy.new(function () end); | |
| 22 end); | |
| 23 | |
| 24 it("should call handlers when an event is fired", function () | |
| 25 e.add_handler("myevent", h); | |
| 26 e.fire_event("myevent"); | |
| 27 assert.spy(h).was_called(); | |
| 28 end); | |
| 29 | |
| 30 it("should not call handlers when a different event is fired", function () | |
| 31 e.add_handler("myevent", h); | |
| 32 e.fire_event("notmyevent"); | |
| 33 assert.spy(h).was_not_called(); | |
| 34 end); | |
| 35 | |
| 36 it("should pass the data argument to handlers", function () | |
| 37 e.add_handler("myevent", h); | |
| 38 e.fire_event("myevent", "mydata"); | |
| 39 assert.spy(h).was_called_with("mydata"); | |
| 40 end); | |
| 41 | |
| 42 it("should support non-string events", function () | |
| 43 local myevent = {}; | |
| 44 e.add_handler(myevent, h); | |
| 45 e.fire_event(myevent, "mydata"); | |
| 46 assert.spy(h).was_called_with("mydata"); | |
| 47 end); | |
| 48 | |
| 49 it("should call handlers in priority order", function () | |
| 50 local data = {}; | |
| 51 e.add_handler("myevent", function () table.insert(data, "h1"); end, 5); | |
| 52 e.add_handler("myevent", function () table.insert(data, "h2"); end, 3); | |
| 53 e.add_handler("myevent", function () table.insert(data, "h3"); end); | |
| 54 e.fire_event("myevent", "mydata"); | |
| 55 assert.same(data, { "h1", "h2", "h3" }); | |
| 56 end); | |
| 57 | |
| 58 it("should support non-integer priority values", function () | |
| 59 local data = {}; | |
| 60 e.add_handler("myevent", function () table.insert(data, "h1"); end, 1); | |
| 61 e.add_handler("myevent", function () table.insert(data, "h2"); end, 0.5); | |
| 62 e.add_handler("myevent", function () table.insert(data, "h3"); end, 0.25); | |
| 63 e.fire_event("myevent", "mydata"); | |
| 64 assert.same(data, { "h1", "h2", "h3" }); | |
| 65 end); | |
| 66 | |
| 67 it("should support negative priority values", function () | |
| 68 local data = {}; | |
| 69 e.add_handler("myevent", function () table.insert(data, "h1"); end, 1); | |
| 70 e.add_handler("myevent", function () table.insert(data, "h2"); end, 0); | |
| 71 e.add_handler("myevent", function () table.insert(data, "h3"); end, -1); | |
| 72 e.fire_event("myevent", "mydata"); | |
| 73 assert.same(data, { "h1", "h2", "h3" }); | |
| 74 end); | |
| 75 | |
| 76 it("should support removing handlers", function () | |
| 77 e.add_handler("myevent", h); | |
| 78 e.fire_event("myevent"); | |
| 79 e.remove_handler("myevent", h); | |
| 80 e.fire_event("myevent"); | |
| 81 assert.spy(h).was_called(1); | |
| 82 end); | |
| 83 | |
| 84 it("should support adding multiple handlers at the same time", function () | |
| 85 local ht = { | |
| 86 myevent1 = spy.new(function () end); | |
| 87 myevent2 = spy.new(function () end); | |
| 88 myevent3 = spy.new(function () end); | |
| 89 }; | |
| 90 e.add_handlers(ht); | |
| 91 e.fire_event("myevent1"); | |
| 92 e.fire_event("myevent2"); | |
| 93 assert.spy(ht.myevent1).was_called(); | |
| 94 assert.spy(ht.myevent2).was_called(); | |
| 95 assert.spy(ht.myevent3).was_not_called(); | |
| 96 end); | |
| 97 | |
| 98 it("should support removing multiple handlers at the same time", function () | |
| 99 local ht = { | |
| 100 myevent1 = spy.new(function () end); | |
| 101 myevent2 = spy.new(function () end); | |
| 102 myevent3 = spy.new(function () end); | |
| 103 }; | |
| 104 e.add_handlers(ht); | |
| 105 e.remove_handlers(ht); | |
| 106 e.fire_event("myevent1"); | |
| 107 e.fire_event("myevent2"); | |
| 108 assert.spy(ht.myevent1).was_not_called(); | |
| 109 assert.spy(ht.myevent2).was_not_called(); | |
| 110 assert.spy(ht.myevent3).was_not_called(); | |
| 111 end); | |
| 112 | |
| 113 pending("should support adding handlers within an event handler") | |
| 114 pending("should support removing handlers within an event handler") | |
| 115 | |
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116 it("should support getting the current handlers for an event", function () |
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117 e.add_handler("myevent", h); |
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118 local handlers = e.get_handlers("myevent"); |
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119 assert.equal(h, handlers[1]); |
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120 end); |
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121 |
| 8760 | 122 describe("wrappers", function () |
| 123 local w | |
| 124 before_each(function () | |
| 125 w = spy.new(function (handlers, event_name, event_data) | |
| 126 assert.is_function(handlers); | |
| 127 assert.equal("myevent", event_name) | |
| 128 assert.equal("abc", event_data); | |
| 129 return handlers(event_name, event_data); | |
| 130 end); | |
| 131 end); | |
| 132 | |
| 133 it("should get called", function () | |
| 134 e.add_wrapper("myevent", w); | |
| 135 e.add_handler("myevent", h); | |
| 136 e.fire_event("myevent", "abc"); | |
| 137 assert.spy(w).was_called(1); | |
| 138 assert.spy(h).was_called(1); | |
| 139 end); | |
| 140 | |
| 141 it("should be removable", function () | |
| 142 e.add_wrapper("myevent", w); | |
| 143 e.add_handler("myevent", h); | |
| 144 e.fire_event("myevent", "abc"); | |
| 145 e.remove_wrapper("myevent", w); | |
| 146 e.fire_event("myevent", "abc"); | |
| 147 assert.spy(w).was_called(1); | |
| 148 assert.spy(h).was_called(2); | |
| 149 end); | |
| 150 | |
| 151 it("should allow multiple wrappers", function () | |
| 152 local w2 = spy.new(function (handlers, event_name, event_data) | |
| 153 return handlers(event_name, event_data); | |
| 154 end); | |
| 155 e.add_wrapper("myevent", w); | |
| 156 e.add_handler("myevent", h); | |
| 157 e.add_wrapper("myevent", w2); | |
| 158 e.fire_event("myevent", "abc"); | |
| 159 e.remove_wrapper("myevent", w); | |
| 160 e.fire_event("myevent", "abc"); | |
| 161 assert.spy(w).was_called(1); | |
| 162 assert.spy(w2).was_called(2); | |
| 163 assert.spy(h).was_called(2); | |
| 164 end); | |
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165 |
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166 it("should support a mix of global and event wrappers", function () |
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167 local w2 = spy.new(function (handlers, event_name, event_data) |
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168 return handlers(event_name, event_data); |
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169 end); |
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170 e.add_wrapper(false, w); |
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171 e.add_handler("myevent", h); |
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172 e.add_wrapper("myevent", w2); |
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173 e.fire_event("myevent", "abc"); |
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174 e.remove_wrapper(false, w); |
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175 e.fire_event("myevent", "abc"); |
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176 assert.spy(w).was_called(1); |
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177 assert.spy(w2).was_called(2); |
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178 assert.spy(h).was_called(2); |
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179 end); |
| 8760 | 180 end); |
| 181 | |
| 182 describe("global wrappers", function () | |
| 183 local w | |
| 184 before_each(function () | |
| 185 w = spy.new(function (handlers, event_name, event_data) | |
| 186 assert.is_function(handlers); | |
| 187 assert.equal("myevent", event_name) | |
| 188 assert.equal("abc", event_data); | |
| 189 return handlers(event_name, event_data); | |
| 190 end); | |
| 191 end); | |
| 192 | |
| 193 it("should get called", function () | |
| 194 e.add_wrapper(false, w); | |
| 195 e.add_handler("myevent", h); | |
| 196 e.fire_event("myevent", "abc"); | |
| 197 assert.spy(w).was_called(1); | |
| 198 assert.spy(h).was_called(1); | |
| 199 end); | |
| 200 | |
| 201 it("should be removable", function () | |
| 202 e.add_wrapper(false, w); | |
| 203 e.add_handler("myevent", h); | |
| 204 e.fire_event("myevent", "abc"); | |
| 205 e.remove_wrapper(false, w); | |
| 206 e.fire_event("myevent", "abc"); | |
| 207 assert.spy(w).was_called(1); | |
| 208 assert.spy(h).was_called(2); | |
| 209 end); | |
| 210 end); | |
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211 |
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212 describe("debug hooks", function () |
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213 it("should get called", function () |
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214 local d = spy.new(function (handler, event_name, event_data) --luacheck: ignore 212/event_name |
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215 return handler(event_data); |
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216 end); |
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217 |
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218 e.add_handler("myevent", h); |
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219 e.fire_event("myevent"); |
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220 |
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221 assert.spy(h).was_called(1); |
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222 assert.spy(d).was_called(0); |
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223 |
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224 assert.is_nil(e.set_debug_hook(d)); |
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225 |
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226 e.fire_event("myevent", { mydata = true }); |
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227 |
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228 assert.spy(h).was_called(2); |
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229 assert.spy(d).was_called(1); |
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230 assert.spy(d).was_called_with(h, "myevent", { mydata = true }); |
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231 |
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232 assert.equal(d, e.set_debug_hook(nil)); |
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233 |
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234 e.fire_event("myevent", { mydata = false }); |
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235 |
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236 assert.spy(h).was_called(3); |
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237 assert.spy(d).was_called(1); |
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238 end); |
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239 it("setting should return any existing debug hook", function () |
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240 local function f() end |
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241 local function g() end |
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242 assert.is_nil(e.set_debug_hook(f)); |
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243 assert.is_equal(f, e.set_debug_hook(g)); |
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244 assert.is_equal(g, e.set_debug_hook(f)); |
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245 assert.is_equal(f, e.set_debug_hook(nil)); |
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246 assert.is_nil(e.set_debug_hook(f)); |
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247 end); |
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248 end); |
| 8760 | 249 end); |
| 250 end); |
