wehub-resource-sync
f36e2104d8
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87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
//
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// Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// loop_example_test.go — the canonical "look here first" usage of
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// AddLoopNode. The single test in this file mirrors what a reader
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// would copy out of godoc, but as a real Test* with an explicit
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// assertion on the loop output. It is kept in its own file (rather
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// than mixed in with loop_integration_test.go) so newcomers can find
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// the smallest working example without scrolling past dozens of
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// interrupt / resume / stream-mode tests.
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//
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// If you change this test, also revisit the package doc comment in
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// loop.go and the .claude/plans/eino-workflow-loop.md plan, since
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// this file is the de-facto runnable documentation.
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package workflowx
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import (
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"context"
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"testing"
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"github.com/cloudwego/eino/compose"
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)
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// TestExample_AddLoopNode is the canonical end-to-end
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// "happy path" usage of AddLoopNode. It was migrated here from a
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// standalone Example function so the assertion on the loop output
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// is explicit (an Example only compares stdout to a comment, which
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// is fragile and silently passes when Println is dropped).
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//
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// The nested workflow increments its input by 1. The outer loop
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// uses the do-while contract via shouldQuit(next >= 3), so iterations
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// run as: in=0 -> 1, in=1 -> 2, in=2 -> 3 (quit). Final output: 3.
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func TestExample_AddLoopNode(t *testing.T) {
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ctx := context.Background()
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sub := compose.NewWorkflow[int, int]()
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inc := compose.InvokableLambda(func(_ context.Context, in int) (int, error) {
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return in + 1, nil
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})
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subNode := sub.AddLambdaNode("inc", inc)
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subNode.AddInput(compose.START)
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sub.End().AddInput("inc")
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outer := compose.NewWorkflow[int, int]()
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shouldQuit := func(_ context.Context, _, _, next int) (bool, error) {
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return next >= 3, nil
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}
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loopNode, err := AddLoopNode(ctx, outer, "loop", sub, shouldQuit,
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WithLoopMaxIterations(10),
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WithLoopCheckpointIDBuilder(func(_ string, iter int) string {
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return "example-loop:" + itoa(iter)
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}),
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)
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if err != nil {
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t.Fatalf("AddLoopNode: %v", err)
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}
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loopNode.AddInput(compose.START)
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outer.End().AddInput("loop")
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runner, err := outer.Compile(ctx)
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if err != nil {
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t.Fatalf("compile: %v", err)
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}
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out, err := runner.Invoke(ctx, 0)
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if err != nil {
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t.Fatalf("invoke: %v", err)
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}
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if out != 3 {
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t.Fatalf("output: got %d, want 3", out)
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}
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}
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