diff --git a/analysis/tests/src/CompletionMultipleEditorCompleteFrom.res b/analysis/tests/src/CompletionMultipleEditorCompleteFrom.res
new file mode 100644
index 000000000..35950e161
--- /dev/null
+++ b/analysis/tests/src/CompletionMultipleEditorCompleteFrom.res
@@ -0,0 +1,22 @@
+@@warning("-26")
+@@warning("-27")
+@@warning("-110")
+
+module A = {
+  @editor.completeFrom(B) @editor.completeFrom(C)
+  type a
+}
+
+module B = {
+  let b = (a: A.a) => 1
+}
+
+module C = {
+  open A
+  let c = (a: a) => {'c'}
+}
+
+let a : A.a = %todo
+// a.
+//   ^com
+// B.b and C.c should be completed
\ No newline at end of file
diff --git a/analysis/tests/src/CompletionPipeProperty.res b/analysis/tests/src/CompletionPipeProperty.res
new file mode 100644
index 000000000..3ef739ed9
--- /dev/null
+++ b/analysis/tests/src/CompletionPipeProperty.res
@@ -0,0 +1,23 @@
+module ObservablePoint = {
+  type op = {
+    mutable x: int,
+    mutable y: int,
+  }
+
+  @send
+  external setBoth: (op, float) => unit = "set"
+
+  @send
+  external set: (op, float, float) => unit = "set"
+}
+
+module Sprite = {
+  type s = {
+    anchor: ObservablePoint.op,
+  }
+}
+
+let sprite : Sprite.s = %todo
+
+// sprite.anchor.
+//               ^com
\ No newline at end of file
diff --git a/analysis/tests/src/Rxjs.res b/analysis/tests/src/Rxjs.res
new file mode 100644
index 000000000..8d3cecbc1
--- /dev/null
+++ b/analysis/tests/src/Rxjs.res
@@ -0,0 +1,51 @@
+// These are bindings used in RxjsCompletion.res
+// We are using a separate file to test complication for modules of external files.
+type target
+
+module Subscriber = {
+  type t<'t> = {next: 't => unit}
+}
+
+module Observable = {
+  // Complete items defined inside the parent module.
+  @editor.completeFrom(Rxjs)
+  type t<'t>
+
+  type dispose = unit => unit
+
+  @new @module("rxjs")
+  external make: (Subscriber.t<'t> => dispose) => t<'t> = "Observable"
+
+  type subscription
+
+  @send
+  external subscribe: (t<'t>, 't => unit) => subscription = "subscribe"
+}
+
+@module("rxjs")
+external fromEvent: (target, string) => Observable.t<'t> = "fromEvent"
+
+type operation<'t, 'u>
+
+@send
+external pipe: (Observable.t<'t>, operation<'t, 'u>) => Observable.t<'u> = "pipe"
+
+@send
+external pipe2: (Observable.t<'t>, operation<'t, 'u>, operation<'u, 'i>) => Observable.t<'i> =
+  "pipe"
+
+@module("rxjs")
+external map: ('t => 'u) => operation<'t, 'u> = "map"
+
+@module("rxjs")
+external distinctUntilChanged: unit => operation<'t, 't> = "distinctUntilChanged"
+
+@module("rxjs")
+external merge: (Observable.t<'t>, Observable.t<'t>) => Observable.t<'t> = "merge"
+
+@module("rxjs")
+external scan: (('acc, 't) => 'acc, 'acc) => operation<'t, 'acc> = "scan"
+
+@module("rxjs")
+external combineLatest: (Observable.t<'a>, Observable.t<'b>) => Observable.t<('a, 'b)> =
+  "combineLatest"
diff --git a/analysis/tests/src/RxjsCompletion.res b/analysis/tests/src/RxjsCompletion.res
new file mode 100644
index 000000000..eaf2b40d4
--- /dev/null
+++ b/analysis/tests/src/RxjsCompletion.res
@@ -0,0 +1,39 @@
+@@warning("-26")
+@@warning("-110")
+
+type keyPress =
+  | Up(string)
+  | Down(string)
+
+@val
+external window: {..} = "window"
+
+let main = async () => {
+  let keyMapObservable = {
+    open Rxjs
+
+    let keydown =
+      fromEvent(Obj.magic(window), "keydown")->pipe2(
+        map(event => Down(event["key"])),
+        distinctUntilChanged(),
+      )
+
+    let keyup =
+      fromEvent(Obj.magic(window), "keyup")->pipe2(
+        map(event => Up(event["key"])),
+        distinctUntilChanged(),
+      )
+
+    // merge(keydown, keyup).
+    //                       ^com
+
+    // Rxjs.Observable.subscribe, Rxjs.pipe and Rxjs.pipe2 should be completed
+  }
+
+  let (a,b) : ( Rxjs.Observable.t<string> , Rxjs.Observable.t<string>) = %todo
+
+  // Rxjs.combineLatest(a, b).
+  //                          ^com
+
+  // Rxjs.Observable.subscribe, Rxjs.pipe and Rxjs.pipe2 should be completed
+}
diff --git a/analysis/tests/src/expected/CompletionMultipleEditorCompleteFrom.res.txt b/analysis/tests/src/expected/CompletionMultipleEditorCompleteFrom.res.txt
new file mode 100644
index 000000000..8476ebfc1
--- /dev/null
+++ b/analysis/tests/src/expected/CompletionMultipleEditorCompleteFrom.res.txt
@@ -0,0 +1,14 @@
+Complete src/CompletionMultipleEditorCompleteFrom.res 19:5
+posCursor:[19:5] posNoWhite:[19:4] Found expr:[19:3->19:5]
+Pexp_field [19:3->19:4] _:[22:0->19:5]
+Completable: Cpath Value[a].""
+Package opens Pervasives.JsxModules.place holder
+Resolved opens 1 pervasives
+ContextPath Value[a].""
+ContextPath Value[a]
+Path a
+CPPipe pathFromEnv:A found:true
+Path A.
+Path B.
+[]
+
diff --git a/analysis/tests/src/expected/CompletionPipeProperty.res.txt b/analysis/tests/src/expected/CompletionPipeProperty.res.txt
new file mode 100644
index 000000000..7cfbd37c9
--- /dev/null
+++ b/analysis/tests/src/expected/CompletionPipeProperty.res.txt
@@ -0,0 +1,50 @@
+Complete src/CompletionPipeProperty.res 21:17
+posCursor:[21:17] posNoWhite:[21:16] Found expr:[21:3->21:17]
+Pexp_field [21:3->21:16] _:[23:0->21:17]
+Completable: Cpath Value[sprite].anchor.""
+Package opens Pervasives.JsxModules.place holder
+Resolved opens 1 pervasives
+ContextPath Value[sprite].anchor.""
+ContextPath Value[sprite].anchor
+ContextPath Value[sprite]
+Path sprite
+CPPipe pathFromEnv:Sprite found:true
+Path Sprite.anchor
+CPPipe pathFromEnv:ObservablePoint found:true
+Path ObservablePoint.
+[{
+    "label": "->ObservablePoint.setBoth",
+    "kind": 12,
+    "tags": [],
+    "detail": "(op, float) => unit",
+    "documentation": null,
+    "sortText": "setBoth",
+    "textEdit": {
+    "range": {"start": {"line": 21, "character": 16}, "end": {"line": 21, "character": 16}},
+    "newText": "->ObservablePoint.setBoth"
+  }
+  }, {
+    "label": "->ObservablePoint.set",
+    "kind": 12,
+    "tags": [],
+    "detail": "(op, float, float) => unit",
+    "documentation": null,
+    "sortText": "set",
+    "textEdit": {
+    "range": {"start": {"line": 21, "character": 16}, "end": {"line": 21, "character": 16}},
+    "newText": "->ObservablePoint.set"
+  }
+  }, {
+    "label": "x",
+    "kind": 5,
+    "tags": [],
+    "detail": "int",
+    "documentation": {"kind": "markdown", "value": "```rescript\nx: int\n```\n\n```rescript\ntype op = {mutable x: int, mutable y: int}\n```"}
+  }, {
+    "label": "y",
+    "kind": 5,
+    "tags": [],
+    "detail": "int",
+    "documentation": {"kind": "markdown", "value": "```rescript\ny: int\n```\n\n```rescript\ntype op = {mutable x: int, mutable y: int}\n```"}
+  }]
+
diff --git a/analysis/tests/src/expected/Rxjs.res.txt b/analysis/tests/src/expected/Rxjs.res.txt
new file mode 100644
index 000000000..e69de29bb
diff --git a/analysis/tests/src/expected/RxjsCompletion.res.txt b/analysis/tests/src/expected/RxjsCompletion.res.txt
new file mode 100644
index 000000000..f07e1dd72
--- /dev/null
+++ b/analysis/tests/src/expected/RxjsCompletion.res.txt
@@ -0,0 +1,62 @@
+Complete src/RxjsCompletion.res 26:29
+posCursor:[26:29] posNoWhite:[26:28] Found expr:[10:17->38:1]
+posCursor:[26:29] posNoWhite:[26:28] Found expr:[11:2->32:78]
+posCursor:[26:29] posNoWhite:[26:28] Found expr:[12:4->26:29]
+posCursor:[26:29] posNoWhite:[26:28] Found expr:[14:4->26:29]
+posCursor:[26:29] posNoWhite:[26:28] Found expr:[20:4->26:29]
+posCursor:[26:29] posNoWhite:[26:28] Found expr:[26:7->26:29]
+Pexp_field [26:7->26:28] _:[30:2->26:29]
+Completable: Cpath Value[merge](Nolabel, Nolabel).""
+Raw opens: 1 Rxjs.place holder
+Package opens Pervasives.JsxModules.place holder
+Resolved opens 2 pervasives Rxjs.res
+ContextPath Value[merge](Nolabel, Nolabel).""
+ContextPath Value[merge](Nolabel, Nolabel)
+ContextPath Value[merge]
+Path merge
+CPPipe pathFromEnv:Observable found:true
+Path Rxjs.Observable.
+Path Rxjs.
+[{
+    "label": "->Observable.subscribe",
+    "kind": 12,
+    "tags": [],
+    "detail": "(t<'t>, 't => unit) => subscription",
+    "documentation": null,
+    "sortText": "subscribe",
+    "textEdit": {
+    "range": {"start": {"line": 26, "character": 28}, "end": {"line": 26, "character": 28}},
+    "newText": "->Observable.subscribe"
+  }
+  }]
+
+Complete src/RxjsCompletion.res 34:30
+posCursor:[34:30] posNoWhite:[34:29] Found expr:[10:17->38:1]
+posCursor:[34:30] posNoWhite:[34:29] Found expr:[10:11->38:1]
+posCursor:[34:30] posNoWhite:[34:29] Found expr:[11:2->34:30]
+posCursor:[34:30] posNoWhite:[34:29] Found expr:[32:2->34:30]
+posCursor:[34:30] posNoWhite:[34:29] Found expr:[34:5->34:30]
+Pexp_field [34:5->34:29] _:[38:0->34:30]
+Completable: Cpath Value[Rxjs, combineLatest](Nolabel, Nolabel).""
+Package opens Pervasives.JsxModules.place holder
+Resolved opens 1 pervasives
+ContextPath Value[Rxjs, combineLatest](Nolabel, Nolabel).""
+ContextPath Value[Rxjs, combineLatest](Nolabel, Nolabel)
+ContextPath Value[Rxjs, combineLatest]
+Path Rxjs.combineLatest
+CPPipe pathFromEnv:Observable found:true
+Path Rxjs.Observable.
+Path Rxjs.
+[{
+    "label": "->Rxjs.Observable.subscribe",
+    "kind": 12,
+    "tags": [],
+    "detail": "(t<'t>, 't => unit) => subscription",
+    "documentation": null,
+    "sortText": "subscribe",
+    "textEdit": {
+    "range": {"start": {"line": 34, "character": 29}, "end": {"line": 34, "character": 29}},
+    "newText": "->Rxjs.Observable.subscribe"
+  }
+  }]
+